Skip the auto shop - Our mechanics make house calls

Q: Heater not blowing air

asked by on

I changed heater motor and resister. Heater motor runs now but is not blowing air. When I change the speed control on the dash it's stuck on one speed still like it was before I changed the resistor. What else could it be, the switch on the dash? Truck has 160.000 on it

My car has 16000 miles.
My car has an automatic transmission.

The blower control switch and blower resistor are used to control how much voltage is sent to the blower motor. If you are having the blower stuck on only one speed then the most common cause is going to be the blower switch and even the connector to the blower switch may be melted and need replaced.

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

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

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 starts, then dies

Hello. From what you are describing, it sounds like the mass airflow (MAF) sensor is not working properly. The mass airflow (MAF) sensor helps to regulate the air/fuel mixture and the idle of the car. When the mass airflow...

Q: Grinding noise with all gears except 1st, car always rumbles on 3rd gear.

Hello. From what you describe it would appear that your vehicle's transmission may be having significant internal issues. Grinding noises and jolts when changing gears, accompanied with noticeable performance losses can be caused by a wide variety of issues and...

Q: 2006 E450 SD lacks power and will not shift until foot is off of throttle wen cold

Hi there. In many cases, when the vehicle will only shift when you lift off the throttle, it tends to be caused by an obstruction of fluid in the hydraulic lines inside the transmission, a faulty shift solenoid or a...

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...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
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...