Car heater only blow hot

Updated: 4/28/2022
User Avatar

Wiki User

12y ago

Best Answer

The best bet is that the valve that controls the flow of water to the heater core is not functioning, but on some cars it's the flaps that control the air flow through the core.

User Avatar

Wiki User

12y ago
This answer is:
User Avatar

Add your answer:

Earn +20 pts
Q: Car heater only blow hot
Write your answer...
Still have questions?
magnify glass
Related questions

Why will the Car heater for a 2002 mercury gm ls not blow hot air only cold?

Check for low coolant

Why my car air conditioner doesn't blow hot air it has cold air only?

You are low on coolant to the heater core.

Why does your heater core blow hot air for only 15 to 30 seconds then fades to coldThe car is 1998 FORD TAURUS?

Plugged heater core. Try flushing it.

Have replaced the t-stat in my car It did not have one when i got the car And now the car is over heating and the heater will not blow hot air Don't think it is heater core?

Sounds to me that the thermostat is in backwards.

Car heater and defrost only blow cold air?

Thermostat stuck open, if older car possibly clogged heater core- when run at oper temp the hoses going into/out of heater core be sure one is very hot - start with thermostat $$$ cheap & easier than a heater core problem!

What causes a heater to blow hot air as soon as you turn it on but then to blow cold air?

If the car is setting in the sun.Heat builds up in the ducts. With my car, it was Heater matrix clogged with radiator sealant. The workshop cleaned it and it's start working fine!

You have 1990 town car the heater will not blow hot just cold you have changed the thermostat what can you do?

Plugged heater core. Faulty temp blend door mechanism.

Why would a thermostat run hot and the car heater blow cold air?

Insufficient amount of coolant or thermostat not opening

Heater does not blow hot air only cold on a 2001 Chrysler sebring?

check your coolant level

My Car heater doesn't blow heat immediately when car is started?

You can not get heat from cold water, The engine has to run long enough to get the water in the engine HOT. That is were you get heat from HOT WATER-- Coolent

What if your car ac blowing hot air after you changed the battery why?

your car ac will only blow hot air when there coolannt in the car is finished or the car is oveerheated.

Why does your 1999 blazer's heater only blow hot air at higher rpm's?

The thermostat could be stuck open.