Q: Heater does not work and has a loss of power to the switches.

asked by on

Ok I have changed the relay both under the hood and by the blower motor as well as the heater resistor. When I hook power to the motor it works. When I turn key on and switch between different fan settings I get some power at the motor but not enough, like 5 volts. Also on the heater control head the Ac and recirculate buttons do not light up. Can it be that this unit is my problem? thanks for any help you can give

My car has 15000 miles.
My car has an automatic transmission.

Hi there. If the motor works fine with power directly to it and when the switch is not working properly causing the motor to come on slower and weak, then switch cluster has failed and needs replaced. If you need further assistance with diagnosing the heating / air conditioning switch cluster, then seek out a professional, such as one from Your Mechanic, to help you.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 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
  1. Home
  2. Questions
  3. Heater does not work and has a loss of power to the switches.

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: Headlights not working?

The multi-function switch is a common fault with your Chevrolet C1500 Suburban. Sometimes the lights don't work at all. Other times the high beams will work but not the low beams. Moving the column up and down could possibly indicate...

Q: Exhaust question

Hello. Replacing the muffler tip will generally produce little noticeable differences in the muffler original sound. You may hear a deeper tone at idle but it has minimal changes on the driving tone of the exhaust. The rule of thumb...

Q: Headlights turn on by themselves

Hello. There are only two relays for the headlight control. There may be a problem with the headlight switch malfunctioning. Check to see how long you have the auto shut off timer set to, as it could be set for...

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...
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.