Skip the auto shop - Our mechanics make house calls

Q: When i shut off my car the heater blower keeps going with unit off and car off. 2006 Chevy Trailblazer

asked by on

Blower motor keeping running with heat unit off and car off only stops when i remove relay been going on for days now and now no heat or air at all

My car has 150000 miles.
My car has a manual transmission.

Hello - either the relay is stuck in the "On" position from burned contacts or the heater switch is similarly stuck in the "on" position (internal contacts at least). I would recommend an electrical inspection by a mobile, professional mechanic, such as one from YourMechanic, who will come to your location, diagnose this problem, give you an accurate assessment of damage and cost estimate for 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

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!
  • Home
  • Questions
  • When i shut off my car the heater blower keeps going with unit off and car off. 2006 Chevy Trailblazer

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 won't start or crank ASD relay making rapid clicking noise when key out of ignition 1999 Dodge Intrepid

Hi there - you have pretty-well identified this problem yourself - well done! Yes, the Automatic Shutdown Relay appears to be sticking in the "power on" position, which is providing a power path to the fuel pump as well as...

Q: A/c stays on unless turn fan off.

Hi there. This issue could be as simple as a broken or damaged relay switch, AC control switch, or could be caused by a mechanical problem with the AC condenser. The best way to know for certain is to...

Q: Car is running hot

Hello. There are multiple things that would explain why your car is running hot. The most likely cause would be that the water pump has gone bad and is not circulating the coolant into the car properly. It is also...

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...
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...