Skip the auto shop - Our mechanics make house calls

Q: Heater temperature does not come up when you raise the temp.

asked by on

When it is. 40 degrees out and you raise the temp. To 70 I still get cold air. The engine temp. Is ok

My car has 100000 miles.
My car has an automatic transmission.

A: Hi there. It sounds like a servo for the te...

Hi there. It sounds like a servo for the temperature control has failed. If the coolant level is full and the engine is reaching operating temperature, then there should be heat available. Make sure that the vents are not set for fresh air as 40 degree air takes a slight bit longer to warm than current cabin air. The cause of the servo being inoperative could be a failed servo, wiring harness, or controller. Checking these will require some disassembly of the instrument panel, a digital volt/ohm meter, and possibly a scan tool with air conditioner controls capabilities to monitor data values. I strongly suggest that you have a qualified technician perform an inspection to avoid replacing unnecessary parts. Your Mechanic has several available technicians that can assist you with a car has no heat inspection.

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: Will something other than gas is in your tank,will it cause the check fuel cap to stay on?

Hi There, You may want to also check the fuel cap filler neck to be sure it is not damaged. On occasion, the filler neck where the cap seals can be damaged causing it not to seal correctly. You may...

Q: hi the code p0700 came on on my 2008 escalade how can i fix this?

This trouble code refers to a transmission control malfunction. This can mean a number of different things. The transmissoin could be damaged internally or there may be some sort of electronic malfunction with the transmission. I would recommend having a...

Q: #1 speak plug continues to blow out

When a spark plug burns out it is not enough to go off of unless a spark plug that went bad was looked at. A plug may go bad from running too lean from a injector that's partially blocked for...

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...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
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...