Skip the auto shop - Our mechanics make house calls

Q: The heat isn't working in my 1995 GMC

asked by on

I changed heater core thermostat blend door actuators but heat still not working. Could it be water pump or radiator? Also radiator car. After letting run reaching normal temp the hose hot but soft. The ones going to heater core are cool

My car has 143000 miles.
My car has an automatic transmission.

A: Hi there. The symptoms you’re describing (e...

Hi there. The symptoms you’re describing (especially the soft radiator hose) along with the fact your heater is not working may be caused by restrictions in the coolant line such as an air bubble. This could have happened when you replaced the heater core thermostat, especially if you didn’t flush the coolant from the radiator during this service. However, it could be a problem with the water pump, so it’s a good idea to have a professional mechanic, such as one from YourMechanic, complete a heater is not working inspection, so they can pinpoint the exact source of your GMC’s issues.

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 not starting after engine exchange.

My first question would be, has the new engine ever started? If the new engine has never started, then there has to be a problem with the installation or the engine is different to the point of being incompatible with...

Q: My car trys to run hot and it leaks anitfrez and my heat don't blow out hot

You will need to identify where the coolant leak is. The water pump or heater core may be leaking causing the cooling system to get low on coolant causing the heater to stop working since no coolant is in heater...

Q: Transmission swap to 400 turbo

Hi there: The vehicle identification codes on a GM product like the Turbo 400 transmission you're looking at indicate three things. The GT indicates the application of the transmission; in this case Chevy Truck. The 69 indicates the manufacturing year;...

Related articles

Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
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...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.