heater wont shut off - Engine Troubleshooting


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heater wont shut off

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Auto Repair Home>> Automotive Repair>> Engine Troubleshooting

paulrice
User

Dec 11, 2009, 3:37 PM

Post #1 of 7 (1794 views)

heater wont shut off	Sign In

i have a 2003 gmc envoy my heat blower motor will not shut off i have to pull a 40amp J-case fuse to shut the blower off i have low med high but the blower wont shut off switch or relay? if relay where is it located?

Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Dec 11, 2009, 4:01 PM

Post #2 of 7 (1791 views)

Re: heater wont shut off	Sign In

Is this an Auto temp Control system?

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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.

paulrice
User

Dec 11, 2009, 5:13 PM

Post #3 of 7 (1786 views)

Re: heater wont shut off	Sign In

yes it is auto temp

Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Dec 11, 2009, 5:36 PM

Post #4 of 7 (1782 views)

Re: heater wont shut off	Sign In

You most likely have a bad blower speed control module. You will find it next to the blower motor where the resister would be on a manual system.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.

paulrice
User

Dec 11, 2009, 5:40 PM

Post #5 of 7 (1778 views)

Re: heater wont shut off	Sign In

is that behind the glove box inside the car?

Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Dec 11, 2009, 6:09 PM

Post #6 of 7 (1776 views)

Re: heater wont shut off	Sign In

Yes, under the dash on right side.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.

paulrice
User

Dec 15, 2009, 10:57 AM

Post #7 of 7 (1761 views)

Re: heater wont shut off	Sign In

thankyou it was the module

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