Skip the auto shop - Our mechanics make house calls

Q: Blower motor only works on high and wont shut off

asked by on

I recently replaced the blower motor control module and the 3 wire electrical connector that plugs into it because the old ones were melted and blower motor wouldnt work. Now the blower only works on high and will not shut off with climate controls turned off and ignition turned off. Any ideas?

My car has 178000 miles.
My car has an automatic transmission.

A: Hello, thanks for writing in about your Jee...

Hello, thanks for writing in about your Jeep Grand Cherokee. The blower control module and connector got hot and burned from the blower motor drawing too much power. It should be replaced to fix this issue. Your A/C blower switch may also be bad or have a melted connector. I recommend replacing the blower motor before anything else is done. If you'd like to get this fixed, have a certified technician, like one from YourMechanic, diagnose the issue with your A/C and make the necessary repairs to your car.

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・Save up to 30%

Get a quote

What others are asking

Q: Moonroof leaking

If the moonroof is leaking, then that may be a sign that the moldings need to be replaced, or that it needs to be resealed by a gasket adhesive. As this may require disassembly and special chemicals to repair, I...

Q: How defroster works when there is no ac

The normal operation of the defroster is for the outside air is drawn into the a/c heater inlet with the system in the defrost position. When the system is in the defrost position the a/c compressor comes on and the...

Q: Check Engine Light is on - code P0405

This code could be caused by the EGR valve, the EGR valve position sensor, a wiring or connector issue, or even a problem with the PCM. P0405 is set when the PCM sees a voltage reading below .35 volts. So,...

Related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
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...
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.