Skip the auto shop - Our mechanics make house calls

Q: Heater is not warm enough

asked by on

The temperature gauge is working like before, standing on 90 normally but not warm enough from heater, even on high

My car has 151000 miles.
My car has a manual transmission.

A: Hi, thanks for writing in. The temperature ...

Hi, thanks for writing in. The temperature of your heater is going to depend on the circulation of the coolant, temperature of the engine, and the associated parts working correctly. The blend door actuators, level of coolant in the system, heater control valves, and driver controls must all be working correctly. You will want to start by inspecting the thermostat and make sure it is working correctly. If it is allowing too much coolant into the system, the heat from the engine used to heat the air for your heater will be decreased. Some sensors will trip a diagnostic troubleshooting code that can be seen when doing a scan. You may want to start there. Further testing of the system is needed. If you would like help, consider having an expert automotive technician from YourMechanic come to your home or office to inspect this heater issue for you, and make or suggest any repairs as needed.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

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: Car running fast after warmup.

Having your car run fast like this sounds like a frustrating experience. Let us get you pointed in the right direction so you can drive your car worry-free. The symptom you are experiencing with your vehicle sounds like something called...

Q: Temperature gauge stopped working

The radiator fan control module could be shorted, causing the fan to stay on for longer than the normal maximum time of fifteen minutes. If the fans shut off before the fifteen minutes, then the gauge may be bad in...

Q: Why does the heater blow hot air for a short time and then blow cold air?

It sounds like you may have a low coolant level. There may not be enough coolant to reach the heater core to provide you with hot air in the car. A visual check of the coolant level while the vehicle...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
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...
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...