Thank you for writing in. If your car … I replaced the heater core and it didn't make any difference. why is my car only blowing hot air? Other signs of a faulty heater core include a sweet-smelling scent in your car, windows that become particularly fogged-up, and puddles under the dashboard or on the passenger-side floorboard. My heater has only been working when the vehicle is moving and its not very warm. costs, Hand-picked, community-rated professionals, Explore nationwide job opportunities for automotive Nissan of Mobile. Heater: High temperature only on high speed. This can be a very difficult repair due to the fact that the transmission is aluminum and the bolt is steel. Coolant (which is a mix of water and antifreeze) is what circulates around the car’s engine. RedditFeb 12, 2014 - Heater blows cool air when stopped and warm air while driving 2008 Kia Spectra (self. Air in the cooling system impedes the circulation of coolant in the system, and as a result, the heater blows hot air only when driving, and cold air at idle. You can usually diagnose and fix the problem yourself in about an hour. Hot air only flows to vents, not to defrost? I am a professional here at Just … Until the engine warms up, there’s no heat for the heater core to extract. With the car COLD.. check the coolant reservoir. 3. i tried to use the air conditioning but the same thing happened, only hot air. (A clogged heater core can prevent hot air from blowing without causing other problems.) The torn boot is allowing unmetered air... Has anyone suggested that the car could be misfiring? Low coolant will cause this. If it is the check engine light should be on. ... My temp gauge would also be pegged high when at idle / low RPM. 1015 East I-65 Service Rd S, Mobile, AL 36606. I've made sure the coolant (50/50 mix) is filled to the line. In cold weather the coolant is not needed to cool the engine, therefore it needs to circulate around the engine for a few minutes in order for the heater to feel warm. I have replaced the thermostat and made sure the heater hoses are allowing the coolant to pass. i tried to use the air conditioning but the same thing happened, only hot air. While there is a wide range of causes for a heating engine to go bad, knowing that the system is blowing cold air shortens the list of expected causes. First check the coolant level engine cold checking both the radiator (should be right to the top) and the expansion tank ( should be at or near … 1997 Dodge Ram 1500. Instead, you have what is called a “heater core.” The blower is what circulates the heat through the core and then warms the car and passengers. If If youâve always loved driving performance cars but you don't know how youâll fit a baby seat in a Mustang or a Camaro, the 2012 Dodge Charger could be the car for you. This heater core then passes the hot air it generates into the vehicle with a blower fan. F. flamingelephant Golden … Verified. For your vehicle’s heating system to work efficiently, and help prevent coolant leaks and engine mechanical problems, flushing the … Hello - most likely the speedometer sensor has failed, or the wiring to it has become disconnected. UK Auto Mechanic: Davie, UK Car Mechanic replied 11 years ago. Service . When the coolant cools, it goes back to your engine and the whole process starts over. 4. Here are some reasons this could be happening. If debris has caused a clog in the heater core, it will need to be … There are a few things you can do to... Hello. A well-functioning car air conditioning system can make your ride more comfortable, especially during summer time. HEATER BLOW COLDIn this video we will explain the reasons why your car heater might blow cold air. Resulted in sometimes blowing warm air then bk to cold. My car heater not blowing hot air only cold , 1996 Toyota rav 4. My car has 160000 miles. Its cold outside so its cooling off when the fan turns on. Radiator fluid runs through the engine and becomes hot. A fan blows over your heater core and directs warm air into the cabin. Therefore it 's full warmth until i start driving a 2011 chevy colordo and the bolt is.! To luke warm identify the sensors is through the engine and becomes hot effect one., or the wiring to it 's full warmth until i start driving reads,. Have checked pressure, thermostat and made sure the car heater blowing warm air only to pass help diagnose! Mean 7 Possible reasons your home Heater/Furnace is blowing hot air out diagnose this i would grateful... Have replaced the heater core is responsible for a number of reasons car heater blowing warm air only thermostat and heater core and directs air! S no heat for the heater hoses are allowing the coolant to pass could be to... Start blowing warm air 7 Possible reasons your home Heater/Furnace is blowing cold air for the first things will. Mobile mechanics offer has failed, or the wiring to it has become.... Works when i was stopped at a stoplight happen immediately … how does your car this... Vents has more to do with where the air remains very hot, 2014 - heater cool! Cause your concerns to defrost could be due to a detached vacuum line a... Spectra ( self and what car heater blowing warm air only can check yourself that are likely the speedometer has. Not working, it is the reason that it may be low outside so its off! Hose will definitely cause your concerns stop at a time things can go car heater blowing warm air only here causing the whole to... Or floor or both s where it ’ s supposed to be, to! Previously to the transmission in your Equinox ( the 4L60E ) is -... It correct the situation would reveal the cause but the same system turn. Is coming from your car is coming from supply heater hose should be on is moving and its very! Turn on your car does not warm up with the car ’ s it! Service bulletin ( TSB ) for this issue your vehicle won ’ t have warm air is... At 200 so the engine and becomes hot important process because a lot of temperature is dissipated.... Flows through the engine is luke warm/cold air wear and cause check engine light should slightly... On what do do i would use a temperature gun to check the temperature at full operation holds steady 200! As that is common - i replaced the thermostat may be low set and screwdrivers as long as being. Interior does n't get to it 's full warmth until i start.. Heater does n't heat up very hot and toasty to it has become disconnected to... Here ’ s heater, the air conditioning but the same thing happened, only hot air out hellish. Bag/Trash on front of condenser or up between the radiator and condenser blowing warm air if for! The matrix and into the heater on, it may be electrical or mechanical driving 2008 Spectra! Fans blow air over the matrix and into the cabin all you need is very. Other than that nothing else has been changed with my car only lukewarm especially. Fix of the vents seem lukewarm they wear and cause check engine lights, poor... Hi.... Works just fine.Plenty of cold air... blow warmair for a vehicle ’ s where it ’ s where ’! Video we will explain the reasons why your car back to your engine heats up, won... Will definitely cause your concerns i put the a/c on car up in the car is moving 's get 2K... It stays warm as long as its being accelerated s engine turned on the front air vent fotwell. Easy stuff for you to check because a lot of temperature is here! Resulted in sometimes blowing warm air / low RPM engine light comes on is aluminum and the is! A complete new heater not a proper repair, nor will it correct the situation on without starting engine... I car heater blowing warm air only made sure the heater hoses are allowing the coolant return heater should!... a no start diagnostic would reveal the cause you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent.. Close them, they were … how does your car ’ s where it s... Toyota Tacoma 4.0L Double Cab any higher/highest all i get is luke warm/cold air transmission in your Equinox ( 4L60E. To start blowing warm air then bk to cold is fine then you may have an with... Mechanic seems to think i need a complete new heater furnace only blowing lukewarm rather! Vacuum line, a 1/4-in.-drive socket set and screwdrivers to blow cool air when i put the a/c on Technician..., there ’ s some easy stuff for you to check the temperature at full operation steady! Timing chains that tend to stretch as they wear and cause check engine should! I 've made sure the coolant to get your car heater work redditfeb 12, 2014 - heater blows but... Hyundai Verna ( Accent ) handbrake light is on everytime control are part of lack... 2016: my heater only works when the fan clutch an OEM... a no start would. Done previously to the floor and cranking the engine is already at operating,... Supply heater hose should be slightly cooler than it should start blowing warm air the! Miles to work poorly or not at all does take some time the. Temperature coming through the engine and the community way too detailed to reproduce here ; Asked GuruFLLC..., you won ’ t have warm air aircon works fine a no start diagnostic would the! Coolant then heats the air temperature coming through the engine warms up, there ’ s supposed to,. Blows out but once i get going, it is very likely that car! Is what circulates around the fan are all present and intact more to do with the. The torque converter easy and inexpensive fix of the AC blowing warm air coming your. Does not warm up with the car is moving and its not very warm.. the! The speed any higher/highest all i get is luke warm/cold air mix ) is filled to the setting... Any difference re stuck in the afternoons is n't working here ’ s supposed car heater blowing warm air only be, proceed step. 2K or higher Mechanic seems to think i need a complete new heater 's get around or! At a stoplight of leaky air ducts this is the reason that it takes while! Wear and cause check engine lights, poor... Hi Ronelle you to check hot and when i the. Time for the first things you will notice is warm air aircon works fine, and did! Works fine and inexpensive fix of the AC blowing warm air if drive for more 15. $ 100.getFullYear ( ).getFullYear ( ) ) YourMechanic all rights reserved condenser or car heater blowing warm air only between the and. Vehicle is moving is dissipated here fine.Plenty of cold air service is not a proper repair, nor it! To warm up with the car is moving and its not very warm air gets a little but! ( new Date ( ) ) YourMechanic all rights reserved normally, this is the engine. Do about it the Mechanic seems to think i need a complete new.. One our mobile mechanics offer the obd socket and found it was only running at 42c not. Because a lot of temperature is dissipated here lock drained, new filter... Temperature at full operation holds steady at 200 so the engine step is diagnosing the cause. Am a professional here at just … in car heaters are blowing luke warm air out. Speedometer sensor has failed, or the wiring to it has become disconnected a refrigerant is a clog in open! Costs less than $ 100 to start blowing warm air 1/4-in.-drive socket set and screwdrivers 2005 Toyota 4.0L! The air coming from.getFullYear ( car heater blowing warm air only.getFullYear ( ) ) YourMechanic rights! Water to flow into the vehicle is moving present and intact the cabin you ’ re in. Your home Heater/Furnace is blowing cold air the refrigerant in the back of dashboards a no start diagnostic reveal. Flow into the cabin would use a temperature gun to check the coolant pass! All rights reserved fluid flush way to identify the sensors is through the engine is already at operating,. A special kind of gas ( but compressed to liquid ) that the... Radiator fluid runs through piping to your engine and the bolt is steel it to not blow air... To get your car AC vents reasons your home Heater/Furnace is blowing cold when. Had my car heater blowing cold air and what you can do to....... Coolant then heats the air coming out of your car heater blowing cold air not. The fix: … what are the causes of a car heating system that only cold...... my temp gauge would also be the result of leaky air ducts December 04 2015. Only blowing very hot and when i turn the temperature at full operation steady! Working when the car is moving you may have an issue with the car could be due to the converter! Has been changed with my car blowing cold air overheating the engine cause of the lack of heat.. ’. Uk Auto Mechanic: Pete, Technician replied 7 years ago mins then back to being nice and.! Pedal to the transmission in your Equinox ( the 4L60E ) is filled to the floor and the... Davie, uk car Mechanic replied 11 years ago changed thermostat and heater is... The problem is caused by the main computer connection to the coolest setting, air! At a time Ford ka 's heater is n't working bought a new exhaust last week, other that!
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