Question about 1992 Cadillac DeVille

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Heater fan will not switch off when car is running or not. Had to pull heater fuse to stop.

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It has a blower control module instead of a resistor mounted in the box next to the blower motor. The blower control module is bad

Posted on May 19, 2009

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Posted on Jan 02, 2017

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2 Answers

Mitsubishi L200 Fan Heater blower Fuse keeps blowing


Why does the heater fuse keep blowing
This place offers a few suggestions, like fan motor old and pulling too much current, or fan switch, ect

Nov 23, 2015 | Mitsubishi Cars & Trucks

1 Answer

Initially I heard a tapping sound around the glove box when I put on the fan. I tried to locate the source of the sound but unsuccessful, so, I decided to run the fan on high speed. It ran and then stopped...


There is a 50amp heater fuse, then a heater relay. Once power gets to the blower motor, the resistor and fan switch provides the ground circuit.

Feb 13, 2014 | 2001 Toyota Camry

1 Answer

Heater fan stop working


Should have a fuse for it; look for 25 or 30 amp heater fuse. If it's good, pull off the connector at blower motor, and with key on and heater fan switch on high setting, check for power at the connector. If you have power there, then the motor nust be bad and need replacing. If no power at the motor, the switch may be bad, or the wiring or the heater relay needs to be investigated.
Good luck.

Feb 02, 2012 | Cars & Trucks

1 Answer

The fan that controls the A/C and heater is stuck in the on position & running full blast. Puching the off button or manually puching the fan buttons does not do anything. The fan continues to run full...


Sounds like a problem with the fan switch. If you can find the fuse for the blower motor, you could pull the fuse to stop the fan until you can get the problem fixed.

May 09, 2011 | Infiniti QX4 Cars & Trucks

1 Answer

Car a/c heat blower stopped no warning


Check for a blown heater motor supply fuse,
Check operation of heater motor control relay,
Check operation of fan speed control switch,
Check heater motor speed control resistor pack (usually located in the heater ducting - in the air flow),
Check the heater motor runs if power directly applied to the motor- if not motor may be faulty.

Aug 26, 2009 | 2003 Dodge Neon

2 Answers

Heater fan won't turn off.


youve got a short prob right at the switch in the dash,unplug the switch and if it shuts off then replace it,if not run new wires form the fan motor too the battery thru a toggle stwich

Feb 26, 2009 | 2003 Chevrolet Suburban 2500

1 Answer

Air condition


Check the following fuses:
10 amp GAUGE under the dash, and the 40 amp HEATER under the hood.
If both fuses are good, I suspect that you may either have a bad fan switch or a bad heater fan motor. The switches are rare to fail, I would suspect the heater motor first. Please try this: Turn the key on; turn the fan switch to high. Look under & behind the glovebox, for the bottom of the heater fan motor. Round thing with 3 screws holding it to the heater box. Using a small hammer, or something that you can tap with, tap on the bottom of the heater fan motor. You just may jar the motor enough to make it run. If it comes back on, you may need to replace it at some point in the near future. Worked for me quite a few times. Try that, repost to me what happens. Hope this helps.

Oct 10, 2008 | 2003 Toyota Corolla

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