Q: Heater blows cold air

asked by on

No heater blows out cold air

My car has 138224 miles.
My car has an automatic transmission.

Hi, thanks for writing in. If your heater is not blowing warm air, the first thing I would recommend checking your coolant level. The engine coolant heats up as the engine heats up. When this happens and the heat is turned on, the hot coolant will pass through the heater core. Next, the blower motor blows air past the heater core to create heat. It is likely that the cooling system has a leak. For this I would recommend having a cooling system pressure test performed by a qualified professional to determine the leak source. I would recommend having an expert from YourMechanic come to your home or office to confirm a diagnosis on the issue and make or suggest the necessary repairs or replacements.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Q: Heater blows cold air

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Ac compressor. Blowing hot air through front vents and cold air through rear vents.

It sounds to me like you have a blend door actuator problem. The blend door actuator is responsible for controlling the blend door. The blend door is responsible for blocking off air to the heater core when your air conditioning...

Q: Motor Locked up

Check to see if the starter motor pinion gear is jammed in the ring gear on the flex plate. On the off chance that somehow the transmission is the issue, you can also try disconnecting the torque converter from the...

Q: When my alternator went out, could it have killed my battery?

Hello, thank you for writing in. The symptoms you are having are classic of a failing alternator. While the battery can be damaged and fail due to the vehicle relying solely on it for power while running, you will want...

Related articles

How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.