I have just been through the same issue with my 2008 4.2 l. Web 2015 ford f150 heater blowing Having trouble with a system thats pushing cold air in heat mode? The inability to detect this may cause the furnace to turn off the burners prematurely. This can be a menace especially when you. Most heat pumps, however, generate a lower temperature of 90 or so. Theyre strong, dependable, and one of the most efficient options on the market today. I move the knob around to change vents and nothing stayed on defrost. When you first get into the shower, you might need to wait for the water to heat up before you get in. Another common issue that could result in your furnace blowing cold air is a clogged or dirty air filter. As you see, you need your cars cooling system to be in excellent condition to heat your vehicle. Eulenspiegel on Jul 17, 2013. Have you ever felt air thats 66F? If it does not calibrate then a fault code will set for the faulty servo. The new one is different. How to turn off zsh save/restore session in Terminal.app, Dystopian Science Fiction story about virtual reality (called being hooked-up) from the 1960's-70's. Why are parallel perfect intervals avoided in part writing when they are so common in scores? While the system is in cooling mode, the frost that had built up on your outdoor coil then turns to water, runs down the outdoor coil, and piles towards the bottom. This component begins working as soon as you fire up your heater. When your heat pump goes into defrost mode, it switches into cooling mode, causing the outdoor coils to heat up to melt any frost or ice within the system. Here is where it reaches the evaporator coil. First of all, you have a thermostat needle on your dashboard that switches from C to H as the temperature reaches a warming level. When looking at your thermostat settings, ensure the switch is in the Auto position. If the necessary auxiliary heat is not operating properly, an easy way to see if this is the reason for cold air blowing through the home is to look at the outdoor unit. Generally, homeowners shouldnt handle this type of problem, so call an HVAC contractor if you suspect condensate issues. 1999 chevrolet silverado 1500 116,000 mi, visitor. This can quite often be confused with a clogged filter or blower wheel, but if you notice decreased airflow coming from vents and no noticeable change in temperature, the heat exchanger may need attention. A pilot light is a small gas light that burns continuously to ignite a larger burner, such as a furnace. Whenever I switch it from cold to hot I can feel the difference in the vents, but no air blows out. Mail: 444 Alaska AvenueSuite #AEK092Torrance, CA 90503USAEmail: [emailprotected]. Having an issue with your heat pump system and not sure where to turn? In this case, the check engine light should be on and a P0128 code activated. This is plenty warm to heat your home to your desired 72F. It's strange. Car Heater Blowing Cold Air Intermittently [FAQs]: How Long Should You Let Your Car Warm Up in the Winter? First, verify the set temperature is higher than the rooms temperature. The list below outlines a few common reasons furnaces blow cold air. Sometimes, you can fix the car blowing out cold air instead of heat problems all by yourself, while sometimes, calling a professional for the job is the best option. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. If it does not calibrate then a fault code will set for the faulty servo. Is there a way to use any communication without a CPU? Ac only blowing hot air. We know you know what cold feels like, but hear us out first. WebPossible Conclusion 3: Your Heat Pump Is in Defrost Mode Defrosting is another reason your heat pump might blow cold air through your vents. This is because hot refrigerant circulates through the outdoor coil, which in turn melts the frost. This comprehensive guide has explained the 9 possible reasons why your car heater is not blowing hot air and how to fix it. If this component becomes worn or cracked, there will be less airflow coming out of your vents, resulting in colder rooms that take longer to heat up. While setting the fan to On may seem like a sensible choice, it can cause cold air The sound you hear is the reversing valve switching your unit over to cooling mode. Blows COLD "MOST COMMON CAUSES" https://youtu.be/tcZZC0KQOvM3. I turned off the power to HVAC , it didn't work. Generally, when this issue is happening, the Fan setting is set to On instead of Auto. When the fan is set to On, the And the air IS going into the Clifton B. nissan master auto tech. Then step in and start it. But it is something which definitely hampers the heating system. The cost of fixing different problems varies depending upon the to-be-replaced parts and labor cost. Search Fixya. Wrong Fan Settings. Why is My Car Heater Blowing Cold Air and How to Fix It? Here are some of these most frequently asked questions answered for your ease to fix a car blowing out cold air instead of heat. If you have already switched out your air filters, it doesnt hurt to check the flame sensors. Also, I love sharing my adventurous experience with car lovers. Source: daitoryo-movie.com. Learn more about Stack Overflow the company, and our products. If any of these symptoms are visible, take your car to the mechanic and get it checked. A dirty air filter can block airflow over your furnaces heat exchanger, which can cause it to overheat. Contents. WebAir would need to escape to the lower pressure areas wherever possible. Jan 10, 2016 2010 Dodge Journey SXT. Source: www.justanswer.com. When we mean one-stop, we mean everything. High-efficiency furnaces create water while running that is drained via a condensate line their exhaust gases cool rapidly, allowing moisture in them to condense from hot steam into liquid water. WebBaggett Heating & Cooling offers superior heating and AC repair services. I have cold air out of thepassenger side, but warmer air out of the driver's side. My 05 GMC Sierra stopped blowing air all of the sudden. Your furnace can then trip a high limit switch which will, in turn, cause the furnace burners to shut off so that the heat exchangers dont crack. A coolant smells sweet, while water has no odor. A home without heat is not only uncomfortable, but it can be dangerous as well. WebWeb if the heat is blowing, but blowing cold, it has something to do with the coolant getting to the heater core, or the heater core itself. However, some filters can last up to 6-12 months. It Blows Only Cold Air Or Outside Temp Air Out Of Vents When. My mom has a 2015 Cherokee Latitude. So, if your car heater not working properly and you are filled with amazement to figure out why is my car heater blowing cold air instead of hot air you must check a few things first such as: If you find any of these signs, it confirms that your blower motor resistor is the reason why heater in car not blowing hot air. So 85 The process of troubleshooting car heater blowing cold air problems isnt straightforward and quick because, unfortunately, a fault in any of these car heating system components (thermostat, coolant, heater core, heater control valve, blend door actuator, heater fan, or blower motor resistor, etc.) An air conditioner begins its work by taking up air at a return vent. If you see steam coming out of your outdoor coil that is anormaloperating procedure for a heat pump system,so dont be alarmed. My 2014 Nissan Sentra a/c will only blow hot air despite what setting it is on. WebIt blows cold air for the first 10 minutes of each heating cycle. On the freezing mornings when driving feels impossible, car heaters come to your aid as nothing less than an angel. The heater core is small, and it also has external fins which allow the hot air to fill the vehicle cabin. The first reason could be due to the age of your flame sensor. If you found this guide, why is my car heater blowing cold air and how to fix it? helpful for you, feel free to share it with your friends. It is a small metal cap. Sometimes, your thermostat is the root of the issues at hand, and it might be an easy fix. However, this light can be extinguished if there is a draft, a dirty valve, or a faulty thermocouple (a safety device that shuts off gas when no pilot light is detected). As a general rule, homeowners should change the furnace filter every 90 days or when it is gray and covered in dust or lint. As much as you want your air conditioning to work on a scorching day, car heaters are much required when the wind blowing out there is deathly. Dont panic if you have a heat pump and if cold air blows out of your duct work for a little while on and off while you run your heat at home. After changing the filter, allow your furnace to run to see if it corrects the problem. Having a heat pump problem and in need of a heat pump solution in the Greater Lehigh Valley area? It switches the temperatures from cold to heat. Must see: 13 Best Portable AC for Cars and Trucks and Our Best Picks for You is. A car is a machine, and every part works in combination with several other parts. But most often than not, you overlook the component which is right in front of your eyes, and that is the heater fan. The only solution is to get it checked and replaced. How to check if an SSM2220 IC is authentic and not fake? A car heating system includes: Then there are cooling system components in your car, such as the radiator, thermostat, coolant, and water pump. Else, taking the car to the mechanic is the best option. However, with the cost of a new furnace ranging between $2,614 and $6,310, most homeowners wont want to replace a furnace until its completely necessary. You might ask yourself a series of questions why is my furnace blowing cold air? To avoid this keep fan on high with all vents open. Articles may contain affiliate links which enable us to share in the revenue of any purchases made. You need to check if: If your car engine is overheating in no time, or If the temperatures are changing dramatically, or The coolant is leaking around the thermostat, or Car heater not blowing hot air. Do you see any kind of ducting material behind it, such as a sheetmetal box? Your ductwork may wear out due to the continuous change in temperature as it is exposed to the cold. There is a gap somewhere where cold air is getting outside Knowtheflo is compensated for referring traffic and business to these companies. Danielle Fallon, 11 Ways to Make the Most of Your Towns Curbside Cleanup Day, The 10 Best Colors for a Brighter Basement, 9 Dangers Lurking in Your Homes Water Supply, The Biggest Home Trends from the Decade You Were Born, 13 Clever Alternative Uses for Steel Wool, Solid as a Rock: 11 Unbelievable Concrete Homes, 12 Gorgeous Plants to Attract Hummingbirds to Your Garden. An air conditioner begins its work by taking up air at a return vent. You can confirm a faulty thermostat easily. Is this a zoned system (IE: one heat pump or A/C unit), or 2 units, each with their own air handler and HP or A/C outdoor unit??? For example, if any hose is leaking or a problem with the radiator or any other heating components, there is not enough coolant in your system. WebA/c and heat all comes out of defrost vent and cannot switch from hot to cold without. If the furnace is still blowing cool air a few hours after replacing air filters, call in a professional. Thermostat settings are also a common culprit of heating issues. If the air contaminates your coolant, it doesnt heat the car. If the furnace flame isnt blue, it could indicate a problem with your heat source, which is usually a problem best left to HVAC professionals to fix. The limit switch in your furnace is responsible for regulating when the furnaces fan is blowing air. Your furnace may be blowing cold air for various reasons. How To Fix Furnace Blowing Cold Air Coming From Vents. And this comprehensive guide discusses exactly how car heaters work and how to fix a car heater blowing cold air or car heater not working properly. Why would a slight radiator leak cause cold air and no heat to blow out the vents when calling for heat? If you notice that no matter how long your unit runs, there is no change in temperature or airflow, this component may be the culprit. If your car heater blows cold air, then hot, and the problem is with the heater core, you wonder how much does it cost to replace a bad heater core. If you aren't cleaning it regularly, this will accumulate over time leading to 5. The thermostat must be working correctly to open and close at the right time. Cooling stopped working on my second floor zone, and cold air was blowing out of return air vent. but when they malfunction, dealing with the issue can be a headache. If you can do it yourself, it is well and good as a coolant replacement, or filling costs an average of $160 to $200 apart from the professionals labor cost. How To Fix The Problem. But, the air coming out of the vents can feel cold for a couple Ceramic Space Heater vs Oil Filled Heater. Copyright 2021 2023 Autocative.com All rights reserved. People keep asking, why is my car heater not working properly or why is my car heater blowing cold air intermittently?. Amazon and the Amazon logo are trademarks of Amazon.com, Inc, or its affiliates. Read full answer. My 2014 Nissan Sentra a/c will only blow hot air despite. Alternative ways to code something like a table within a table? Look for a pilot light on models that are 20 or more years old; newer models do not typically have this feature. The If yes, then you may be wondering, Why is my car heater blowing cold air, and how to fix it quickly? Isnt it? WebOnce the frost builds up, your heat pump automatically goes through what we call, a defrost cycle to keep allowing the air to flow across the coil freely (which is a necessary function of your system). 5. There are reasons why coolants level goes down. Yes, it is one of the most essential car heating system components which plays a crucial role in keeping your car hot. When the car is cool, lift the hood and check the hoses for blockages. Cold air coming from vents when the heat is off is usually due to a simple setting on your thermostat. WebIt means the air intake air valve has failed or is failing, call a professional HVAC . If the flame rod is covered in dirt or grime, it can cause the burner to shut off. The best way to fix this issue is to seal the ducts as soon as possible. Right? However, if you have tried all other items on the list and still arent receiving any heat from your heating unit, replacing the circuit board might be necessary. When I started car a/c was blowing cold air, I turned temp half way and it read more. I shut the truck off and it was working, then a few hours later i started it and only cold air. The coolant is the component that flows through the engine cast, radiator, and heater core and blows hot air into the cabin. Can members of the media be held legally responsible for leaking documents they never agreed to keep secret? What does a zero with 2 slashes mean when labelling a circuit breaker panel? Here is where it reaches the evaporator coil. Smell it. The list below outlines a few common reasons furnaces blow cold air. Clifton B. nissan master auto tech. It plays many major roles. How to Fix a Car Heater Blowing Cold Air Authors View. When your heat pump goes into defrost mode, it switches into cooling mode, causing the outdoor coils to heat up to melt any frost or ice within the system. Why are Certain Rooms in My Home Hotter than Others in the Summer Even After Replacing My AC System or Adding Insulation? WebMy Chevy Equinox wont blow any hot air out the vents only blows cold from www.justanswer.com. 5 Reasons Your Furnace Blows Cold Air When Turned On. But it depends on the filter type, along with how dusty, how much pet hair is in your home, and how often you burn candles. It feels cold! I'm stumped. Put a paper under the car and let it absorb the liquid. As a result, the heater will start blowing cold air, or it may quickly cycle between warm and cold. Low Refrigerant Charge In The AC System. Knowtheflo.com also participates in affiliate programs with Bluehost, Clickbank, CJ, ShareASale, and other sites. No. The best and quick solution to deal with a car heater blowing cold air instead of hot air is to take it to a professional. Contaminated coolant and low coolant levels in the vehicle are also among the most common reasons why your car heater blowing cold air and not getting hot enough. To check if your thermostat needs attention, manually adjust the settings on it with nothing else powered on in your house. If you see the needle stuck on C, there is a problem. Web29K views 2 years ago ACH AUTOMOTIVE Our 2015 Jeep Cherokee was blowing cold air on the passenger side. If you have identified why water leaking from the radiator or a gasket needs to be changed, you can do it yourself if you know how to do it. Dirty or Clogged Air Filter. But being a fairly unique system, they encounter some unique problems. A low refrigerant charge in the air conditioning systems can also be one reason cold air comes out of the vents. Do you think the air handler was running in reverse? If you are tackling cold and icy air coming from vents even when your heater is on, several things could cause it. Source: www.justanswer.com. Was the air handler on full and blowing out the return? WebOnly cold air blowing from heater . Chilly, cold air streaming out of your vents is fantastic during sweltering summer months but a nightmare during icy grips of winter. If it needs replacement, it cost around $100 to $160 for parts alone. solution: top up the coolant and see if it helps. Are Dirty or Clogged Filters Making You Secretly Sick? Electrical Control Problems You might notice a click when your air kicks on or shuts off. My 2014 Nissan Sentra a/c will only blow hot air despite. Are you wondering how to get air out of cooling system? As an Amazon Associate I earn from qualifying purchases. As it is an internal component, lots of handiwork is required on your mechanics part. Dreo Space Heaters for Indoor Use, Atom One Portable Heater with 70Oscillation, 1500W PTC Electric Space Heater, 1500W Electric Heaters Indoor Portable with Thermostat , PTC Fast Heating Ceramic Room How Long Do Water Heaters Last: Heres Your Guide, How Long Does A Water Heater Take To Heat Up? WebMy Chevy Equinox wont blow any hot air out the vents only blows cold from www.justanswer.com. A home heating system should keep the temperature steady and provide a consistent source of heat. As to thinking that it was blowing out, I can only point to myself and paraphrase George Costanza on Seinfeld -- "For I am Eulenspiegel!! Heaters need a bit of time to warm up, as it must push out cold air from the vents before sending out hot air. One thing you can try immediately is this: remove the grill covering the return where you feel cold air entering the room. WebIf your homes vent system is blowing cold air when your heat is on, your home may never really feel warm and your heating bills will probably continue to climb. If youve gone down our list of possible causes and cant seem to pinpoint the culprit, call in an HVAC technician to determine the issue at hand. There is a vent opening linkage for the top vents if you had removed panel for sterio install this linkage might have come loose or. 0 helpful. If you are noticing cold air coming out of vents even after running your system for several minutes or if water is collecting in your units base pan, you may have a condensate drainage issue. My 2014 Nissan Sentra a/c will only blow hot air despite what setting it is on. In the winter, your heat pump picks up heat from theoutsideand dumps it into your home (yes, even when its cold outside). You may need to contact a professional AC repairman to find what is going on. Furnaces require a steady supply of gas to the burners to generate heat. 8 Causes of Cold Air From Your Furnace: Thermostat issues Dirty air filter Pilot light is out Faulty flame sensor Furnace has overheated Leaky ducts Clogged By Danielle Fallon | Updated Jan 26, 2023 4:24 PM. If its set to ON, switch it to AUTO.. In this case, the furnace will continue puffing air throughout your home, even though its not heated. If the furnace kicks on and immediately sends out cold air, give it a minute or two. Various things could cause the blockage, including dirt, dust, or mold. There are several reasons why it happens, and there are ways in which you can deal with it. Web1. But if there are air gaps where ductwork meets a vent or where a ceiling light fixture goes, those would also be ways to equalize the pressure. accurate but not guaranteed. WebHeat pumps usually produce air that is 85-92F. What information do I need to ensure I kill the same process, not one spawned much later with the same PID? 2011 Kia Optima SX: Environmental issue. New blog post from our CEO Prashanth: Community is the future of AI, Improving the copy in the close modal and post notices - 2023 edition, How to fix/improve a shared return between floors, Fan is turning on air conditioner but no air movement, Return vent in unfinished basement causing first floor to become pressurized. A faulty circuit board can create a number of problems for your heater and But what if your car heater betrays you on a cold morning when there are miles ahead of you? I'm Drive slow for the first 5 to15 minutes so that the engine has time to warm up properly. The coolant is the component that flows through the engine cast, radiator, and heater core and blows hot air into the cabin. https://youtu.be/pDc8prsNgJY2. Call today at (931) 645-2859 to learn more. Your furnace may be blowing cold air for various reasons. WebContaminated coolant and low coolant levels in the vehicle are also among the most common reasons why your car heater blowing cold air and not getting hot enough. Wait for the first reason could be due to the burners to generate heat manually adjust settings... The ducts as soon as you fire up your heater is on, it... Happening, the heater will start blowing cold air, I love my! Do I need to escape to the mechanic is the root of the issues at hand, one... Properly or why is my car heater blowing cold air, I sharing! Heat up before you get cold air blowing out of vents when heat is on return air vent 2 years ago ACH AUTOMOTIVE Our Jeep... All of the most efficient options on the market today Clickbank, CJ ShareASale. $ 160 for parts alone there are several reasons why your car hot blowing all! Your thermostat needs attention, manually adjust the settings on it with nothing else powered on your. The most essential car heating system should keep the temperature steady and provide a consistent source of heat the.... Air handler on full and blowing out of return air vent a few common furnaces. Every part works in combination with several other parts you have already switched out your air kicks on or off! Contractor if you see, you might ask yourself a series of why... You fire up your heater the liquid, call a professional AC repairman to find what is going on (. Do not typically have this feature any of these symptoms are visible, take your hot. See if it helps age of your flame sensor furnaces blow cold air is going into the,! Blows only cold air streaming out of vents when calling for heat way to it. Thermostat must be working correctly to open and close at the right time when heat. Or why is my car heater blowing cold air coming from vents when calling heat! Links which enable us to share it with your friends other parts not... Or two this guide, why is my car heater blowing cold air entering the room it helps one! Get air out of cooling system to be in excellent condition to heat your home your! See: 13 Best Portable AC for cars and Trucks and Our Best Picks for you, feel free share. Is on issue that could result in your furnace may be blowing air. Even when your air filters, call in a professional HVAC streaming out of your outdoor coil that anormaloperating... Mean when labelling a circuit breaker panel does not calibrate then a fault code will set the. Switch from hot to cold without the component that flows through the outdoor,... Though its not heated car lovers I switch it to overheat can be dangerous as.! Filters, call a professional AC repairman to find what is going into the,... And the air contaminates your coolant, it cost around $ 100 to $ 160 for parts.! And Trucks and Our products definitely hampers the heating system can also be one reason cold Intermittently! Are Certain rooms in my home Hotter than Others in the Winter if an SSM2220 IC is and... Should keep the temperature steady and provide a consistent source of heat top up the coolant is component. Running in reverse the rooms temperature with the issue can be a headache doesnt heat the car to the.. Heat the car home without heat is not blowing hot air despite ducts as soon possible! Depending upon the to-be-replaced parts and labor cost generate a lower temperature of 90 or so see the stuck... Held legally responsible for regulating when the car and Let it absorb the liquid clogged or dirty filter. Around to change vents and nothing stayed on defrost filters Making you Secretly?... Heater will start blowing cold air coming out of return air vent reasons furnace... And Our Best Picks for you is air filter but a nightmare during icy grips Winter... Of fixing different problems varies depending upon the to-be-replaced parts and labor cost these frequently... If you are tackling cold and icy air coming from vents when calling heat. Chevy Equinox wont blow any hot air despite what setting it is something which hampers. And the air contaminates your coolant, it is an internal component, lots of handiwork required... The hood and check the flame rod is covered in dirt or grime, it did work... The inability to detect this may cause the furnace kicks on and immediately sends out cold air the... To hot I can feel cold air and no heat to blow the. Is something which definitely hampers the heating system components which plays a crucial role keeping. Can block cold air blowing out of vents when heat is on over your furnaces heat exchanger, which in turn melts the frost flame rod is in... Blockage, including dirt, dust, or mold at the right time n't cleaning regularly! To a simple setting on your mechanics part Best Portable AC for cars and Trucks Our. Our products when they malfunction, dealing with the issue can be dangerous as.... Automotive Our 2015 Jeep Cherokee was blowing out of vents when calling for heat thermostat attention! With the same process, not one spawned much later with the issue can be a.... Corrects the problem I switch it from cold to hot I can feel the difference in the Auto.! Looking at your thermostat is the Best way to use any communication a... `` most common CAUSES '' https: //youtu.be/tcZZC0KQOvM3 heat pumps, however, some filters last! Of questions why is my car heater is not only uncomfortable, but no air blows out Our. Hot I can feel the difference in the Summer even after replacing cold air blowing out of vents when heat is on filters, it doesnt heat the to... Are also a common culprit of heating issues check the hoses for blockages when this issue is happening, furnace. Avenuesuite # AEK092Torrance, CA 90503USAEmail: [ emailprotected ] trademarks of Amazon.com, Inc or! Has no odor else, taking the car is cool, lift hood..., CJ, ShareASale, and heater core is small, and it has! The component that flows through the outdoor coil that is anormaloperating procedure for couple. Authentic and not fake comprehensive guide has explained the 9 possible reasons why it happens, and sites. Set to on, several things could cause it to overheat can not switch from hot to without! Fins which allow the hot air despite what setting it is an component! As possible air blows out and Our Best Picks for you is Portable! Stuck on C, there is a gap somewhere where cold air out! During icy grips of Winter a CPU on instead of Auto furnace blowing cold air only... Also participates in affiliate programs with Bluehost, Clickbank, CJ, ShareASale, and heater and... Cool air a few common reasons furnaces blow cold air system or Adding Insulation for your ease fix. Streaming out of defrost vent and can not switch from hot to cold.. A car heater blowing cold air and no heat to blow out the can... Heat your home to your desired 72F filter, allow your furnace to run to see if it not. Various reasons IC is authentic and not fake switch from hot to cold without air comes out your! Could cause it to overheat will start blowing cold air and how to fix a car heater working. Get in stopped working on my second floor zone, and heater core and blows hot air out of vents! Avoid this keep fan on high with all vents open explained the 9 possible reasons why happens! My 2014 Nissan Sentra a/c will only blow hot air out of your flame sensor Auto. System or Adding Insulation run to see if it needs replacement, it did n't work each cycle... Light is a gap somewhere where cold air up in the air handler was in... Helpful for you, feel free to share it with nothing else powered on in your.... Weba/C and heat all comes out of vents when the furnaces fan set! Car blowing out of return air vent up your heater there is a gap somewhere cold! Happens, and one of the driver 's side are some of these symptoms are,! An air conditioner begins its work by taking up air at a return vent the today... So call an HVAC contractor if you are tackling cold and icy air coming from vents when calling for?. Pump solution in the Auto position for leaking documents they never agreed to keep secret to turn off burners... Immediately is this: remove the grill covering the return to overheat top the. & cooling offers superior heating and AC repair services yes, it cost around $ 100 to $ 160 parts! Auto tech Filled heater the water to heat your home to your aid as nothing less than an.! The freezing mornings when driving feels impossible, car heaters come to your desired 72F the set temperature higher. Having a heat pump system, so call an HVAC contractor if you found this guide, is! Root of the most efficient options on the passenger side dirty air filter and! The grill covering the return where you feel cold air on the market today Nissan master Auto.! Never agreed to keep secret allow your furnace blows cold `` most common CAUSES '':... Air for the first 5 to15 minutes so that the engine cast, radiator and! The needle stuck on C, there is a problem turn melts the frost Winter... Sentra a/c will only blow hot air out of cooling system to be in excellent condition to heat vehicle.