Skip the auto shop - Our mechanics make house calls

Q: Heater not working - 2002 Chevrolet S10

asked by on

I replaced the water pump, thermostat and heater core. Srill only blows warm. Temp actuactor is working

My car has 157000 miles.
My car has an automatic transmission.

A: Hi there. It sounds like you may have a ble...

Hi there. It sounds like you may have a blend door motor failure. The blend door motor moves the blend door inside the HVAC case to literally blend the air temperature out of the vents by directing the airflow accordingly across the heater core and the evaporator. Remove the glove box door and inspect the blend door motor to see if it is moving when you change the temperature accordingly. If it moves, make sure whether the door is moving as well. The gear on the blend motor is known to fail. If this is the case, replace the blend door motor and recheck the operation and for heat. If you would like to have the fault verified, a qualified pro from YourMechanic can come to your car’s location to diagnose the heating problem and assist with repairs.

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: My car's air conditioning/heating system only works for a brief time and blows the wrong temperature air

Your Villager comes equipped with either an automatic climate control system or a manual controlled climate system. The automatic controlled system uses four separate sensors and as many modules to operate. Any of these can be the source of the...

Q: Ac compressor fuse blows 2004 Ford Taurus

Hi there - from your symptoms, it sounds like your AC compressor clutch has locked up, or the clutch bearing has seized, such that the serpentine belt tries to turn the compressor whenever you start the engine. (REALLY problematic if...

Q: Water coming out of radiator tube

Hello, if the temperature gauge show a high temperature above 220F, this would account for the water coming out of the overflow hose (which I assume is the pipe you refer to?). If driving temperatures were normal, then check to...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
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...