Question about 2005 Pontiac Grand Prix

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HVAC fan motor always running

I have the same problem. I pulled the fuse, #30 under the hood. What was your fix?

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  • 365 Answers

Do you have an "automatic" temperature adjustment, in other words can you select the temp of your A/C? If so, the switch that controls the temp change is the culprit...Dealer only fix...sorry!

Posted on Jun 21, 2009

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Posted on Jan 02, 2017

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2002 TAHOE FRONT BLOWER NOT WORKING, APPLY DIRECT 12VDC TO FAN AND IT WORK. REPLACE NEW BLOWER RESISTOR AND STILL NOT WORKING. NO POWER TO THE ORANGE WIRE! FUSE CHECK OUT OKAY.


Manual or automatic climate control ? Which orange wire . There are two . Blower motor relay for high speed . FRT/ HVAC fuse 30 amp located in the under hood fuse/relay box . HTR-A/C fuse 25amp. located in the left I/P fuse box .

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What fuse goes to the ac/heater fan in a 2004 Buick Rendevous


https://s4.postimg.org/m2cv5i825/hvac.jpg

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See ign fuse 3--40 amp toward the right, in power distribution center under the hood, it sends voltage to blower motor control module. The two fuses toward the left, among other places, sends voltage to hvac control module. I looked up info for automatic hvac. Are there any applicable hvac trouble codes? At the moment, I can't rule out the blower motor itself?

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2006 ford expolrer fan keep running when heat is off


Could be one of blower motor relays contacts stuck closed . There are two blower motor relays 1 & 2 . One is located in the under hood fuse/relay box .
Or if your explore has automatic HVAC , it could be the front blower motor speed controller , this have been known to do this .
Which HVAC does your explorer have , manual or electronic automatic control.

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I have a 01 blazer the heater fan quit working where is the fuse located so I can check it!


Fo to this site and create an account. From there you can access and download your owner manual which has the fuse diagram and other handy information.


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Aug 13, 2016 | Cars & Trucks

1 Answer

Where is the fuse for the heater located in a 2008 gmc sierra


Do you have The Automatic or Manual HVAC system ? Doesn't matter fuse's are the same ! Out in the under hood fuse / relay box are two fuse's for heater HVAC BATT fuse #39 10 amp an # 70 40 amp . HVAC BLWR . HVAC = heater ventilation an air conditioning ! So Tom what problem are you having ? Heater fan not working ? There is also a blower motor control module involved !

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The fan stopped working and I have no heat. What can be the cause?


Only 4 items in fan circuit I think; Fan motor, ballast speed resistor, switch and fuse. If you can access the single wire connected directly to the motor, you can use a jumper wire to batt + to check motor.

Feb 08, 2015 | 2001 Oldsmobile Alero

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I have a 2000 chevy blazer the blower works on 1 2 and 3 but it wont work on 4 I changed the dash switch and the resister but that didn't work


There is a relay in the under hood fuse box , blower motor relay .When switched to high it energizes the relay allowing power from the HVAC fuse /30 amp to flow direct to the blower motor. from pin 30 to pin 87 , if you look on the side of the relay there is a diagram .For all other speeds the current flows from the switch through the resistor through pin 87a to pin 30 on to the blower motor ! Check the HVAC fuse in the under hood fuse block .IF the fuse is good check for continuity between the fuse side with out B+ that means pulling the fuse and using a volt meter to see which side has power and checking the side that doesn't have power to pin 87 at the relay socket ! Probably a bad fuse or stuck relay . Pull that relay and try a different one. You can get wiring diagram at www.bbbind.com click on technical information ,then click on Technical Service Bulletins & Wiring Diagrams .then on next page go down to the bottom and click on I agree . next page click wiring diagrams ,then just fill in you vehicle information .then HVAC system . click on diagram, then you will see 7 links , click on the 5th one and that's the diagram for the blower motor circuit !

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1 Answer

I have a 2005 gmc siera .I undid the battery and I now have heat on the driver side ,but now it wont go back to a/c. i think it is the door motor. how do i get the center consol out.( mine is digital not...


Before you do anything pull the HVAC fuse in the under-hood fuse box for 30 seconds. Reinstall the fuse. Turn the key to the run position. You should hear the HVAC going through a self test. Don't touch anything until it is done. Once its done, about 45 seconds or start up the vehicle and see if everything is working.

Sometimes it takes several tries to get it to work.

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1 Answer

1992 cadillac deville - hvac blower motor does not shut off.


replace the relay , when a relay sticks like that , a good test is to slap it with something like the handle of a screw driver , see if it un-sticks , its not a fix , just a test . cheers'

Jan 13, 2009 | 1992 Cadillac DeVille

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