answersLogoWhite

0

  • Heating AC and Engine Cooling
  • Heater Cores and Blower Fans
  • Car Heaters
  • VW Sharan

Why is your heater blowing constant hot air even when set to cold?

User Avatar

Wiki User

βˆ™ 2008-11-07 00:34:45

Best Answer
Copy

Heater control valve stuck open. Possible blend air door failure.

2008-11-07 00:34:45
This answer is:
πŸ€“
🀯
πŸ€”
User Avatar

Add your answer:

Earn +5 pts
Q: Why is your heater blowing constant hot air even when set to cold?
Write your answer...
Submit

Related Questions

How hard is it and how do you fix a 1986 Ford Thunderbird heater core that is blowing steam even when the heat is off?

Replace the heater core. It is leaking.


Do you use the water heater when you use just cold water?

If water is only drawn from the cold faucet, then no, the water heater is not involved. However, if water is drawn from the hot faucet- even for a few seconds- hot water IS withdrawn from the heater, and fresh cold water drawn in to be heated- even if the hot water did not make it all the way through the pipe to the faucet- and the water heater will work to heat that fresh cold water.


Why would when you put the heater on it heats then goes cold When you push hard on the dial it starts to blow hot when you let go it gets cold even when it is on hot?

heater switch needs replaced


Why is your 91 Buick Skylark blowing out cold air even when driven for 30 miles?

Thermostat stuck open or heater core plugged. CONSIDER THE POSSIBILITY YOUR HEATER VALVE IS CLOSED/CABLE RENDERED INOPERATIVE BY A BROKEN PLASTIC SLIDER HOUSING,AS IS OFTEN THE CASE ON OTHER MODELS/MAKES,SHOULD IT NEVER WARM UP.


My 2003 VW Jetta GLS heating and cooling blowing heat out even when I have it on vent and it's cold outside other times heat will not work at all and only cold air comes out what is wrong with it?

The first thing that you need to check will be to see if the controller in the dash is working the a/c and heater doors under the dash................


Where is heater core in 2005 Nissan Altima?

why is my 2006 Altima blowing cold air when not in motion , example stop light or as soon as it is idling even when it has ran for a long time and the engine is warm. The controls for the "doors"(vent covers that direct the air)are run by vacuum. There cold be a vacuum leak of one of the doors is stuck.


Why is the heater in your 06 vectra permanently on hot even when turned to cold?

The blend door is probably stuck.


Is it cold if its 70 degrees and the wind is blowing?

No. Even in a strong wind, 70 degrees would still feel warm.


What happens when hot water is on top of cold water?

Hot water is lighter then cold water so it would stay up on top of cold water till both waters naturalize to the same temp. a good example is a water heater and (if its not to old) open your drain at the bottom of the water heater and if your dip tube is still good you should always get cold water out of it even if the water heater is on and your water heater pressure is on.


How do you fix a heater that wont blow air in a 94 Nissan Sentra?

first of all i hate to say an obvious answer but does the heater motor even turn. Does it blow air at all. The first thing i would check is if the fan motor is blowing any air at all. If not u need to put in a new heater fan motor. first of all i hate to say an obvious answer but does the heater motor even turn. Does it blow air at all. The first thing i would check is if the fan motor is blowing any air at all. If not u need to put in a new heater fan motor.


What makes your windows keep fogging up even with the defroster on a 1992 Bonneville?

Your heater core is leaking in it's housing box and blowing moist air through the heater/defroster. Try bardall radiator stop leak. If no help, install new heater core. Chuck.


Where is the defroster in a car?

the defroster is actually your a/c. it doesn't run much when it's cold outside but it works with your heater to remove the moisture from inside the car. blowing warm dry air on the windshield. just like it removes the moisture (humidity) from inside the car in the summer. the difference is the temp. you have it on. even if the a/c don't work, the heater will still do the job, just not quite as well.


Ac lines are all cold and sweaty but blowing only hot air inside what causes this?

I have a 2002 Jeep Grand Cherokee Laredo that was doing the same thing. The problem was a faulty ac/heater switch. You put the switch on ac, compresser engages, lines get cold and frosty, but only hot air is coming out of the vents, because the switch has changed back to heater even though it shows ac. The cure is to have the center panel which contains the ac/heater switch, fan speed switch and temperature control replaced.


Vehicle blows out cold air even when heat is on hear a constant clicking noise when one switches the heat setting to hot or even warm but it doesn't click when i turn it to cold what to do?

Sell the car! Mang


2004 Chevy Tahoe not blowing air from AC fuse AC good. thanks?

Is is blowing hot air on the drivers side, or nothing at all? If it is blowing hot air even though you have the thermostat set on cold - it could be the heat actuator. It will occasionally do this after about 75000 miles or so. Mine started at 114000 miles and if you turn it off and turn it back on - it will start blowing cold again...$400 repair. Hope this helps.


Can you get better by blowing your nose a lot during the day?

Not necessarily. Your nose actually may even get a little more irritated, because of the constant contact of your nose, but it will get all of the snot out


1989 corvette heater blows cold air even though both lines are hot going to the firewall do you have to change the heater core and if so how do you do it?

I would say that your heater core is ok...it sounds like you have a bled door promlem in the dash.


Does cold weather affect a cold?

Not really in any big way. Being out in cold weather does not cause the common cold. While a noticeable increase in the numbers of common colds and the flu season happen during the winter, it is the microorganisms that cause the common cold and flu and not the temperature. However, cold weather could make certain symptoms worse. For instance, a runny nose can be worse when out in the cold even if you don't have a common cold viral infection. Being out when you have a cold adds to the constant blowing and wiping of your nose. That can cause the skin to become raw and dry which allows the cold temperature to accentuate the soreness.


Why does the heater of my Chrysler van not work in extremely cold weather and engine thermometer still reads cold even after hours of driving?

thermostate stuck open need new thermostate


Why are a 1996 Lumina and a 1996 Sonoma both blowing out hot air if the compressor is working you put freon in and checked the fuses?

Maybe you have a bad heater core and it's causing the ac to blow hot air in instead of blowing cold air inside your car that's what's wrong with my 91 Chevy Caprice and we put freon and checked it and it blows hot air like what you are saying i was told that it was something with the heater core so to my knowledge it sounds like the heater core is bad in your car or cars try replacing it or having someone replace it and see if that works it worked for me now i have cold air again hope i was able to help you with your questionAnswercheck your airflow valves, also check the heater valve it could be stuck open, could even install a manual valve(s)


Why is your 96 Chevy lumina blowing cold air even when the engine is warm?

it may be that you need to replace your thermastat, or coolent level is low wrong mixture


Why would the coolant light come on and the heater blow cold air in a 1985 Cadillac Deville 4.1 even after you tried replacing the thermostat and flushing the radiator?

Heater core (radiator) needs to be cleaned or changed


Renault scenic heater blows cold air only even with a new thermostat?

Low coolant? Heater core restricted or plugged? Heater core airbound? Water pump not circulating coolant? Heater control cable not adjusted properly? With mine it was Heater matrix clogged with radiator sealant. The workshop cleaned it and it's start working fine!


What is it called when an animal maintains a constant internal temperature even when it is cold outside?

It is called homeostasis (internal environment maintained at a constant level) or thermostasis (internal heat maintained at a constant temperature). The overall name for the processes by which temperature is controlled is thermoregulation.


What is homeostasis?

Homeostasis is the maintenance of a constant internal environment in organisms even when there are external changes. For example, the body is able to maintain its same temperature of 98.6 even when it is really cold.