Q: The heater is hot as long as you keep the blower on low, but gets cold when you turn it up

asked by on

My heater works good with the heat on low but once I turn it up turn the blower up on it gets cold

My car has 187000 miles.
My car has an automatic transmission.

Hi there. The issue you’re describing is typically caused by a heater blower motor resister that is malfunctioning or the heater core that might be obstructed with debris. In both cases, removing the dashboard to inspect and diagnose the precise source of your heating system issue will need to be completed. There are other possible components that may be faulty including a heater control valve or temperature sensor that can be checked out during an inspection of the heating system.

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. The heater is hot as long as you keep the blower on low, but gets cold when you turn it up

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: Leak from under dash

Hello. It is likely the heater core causing the leak because it is on the passenger side and when they leak the passenger floor becomes wet. It may also be a heater core gasket that is leaking but the heater...

Q: Oil pressure gague on 0 and check engine light on

Hi There, It sounds like one of two things are happening. Either the motor is in fact low on oil or the oil pressure sending unit is not working properly and may be producing a faulty reading. I would recommend...

Q: How do I adjust the remote start front defrost?

When the remote start front defrost feature is turned on, your front defroster will begin operating when the engine is turned on via remote start. To turn this feature on or off, follow these steps: 1. Press the Up/Down buttons...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
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...