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


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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?

Jul 11, 2017 | 2004 Buick Rendezvous

1 Answer

Blower fan not working at all 2004 Buick rendezvous


Which system ?
HVAC Systems - Manual HVAC Systems - Automatic
If automatic it's probably the blower motor control processor .
Blower Motor Control Processor The blower motor control processor is an interface between the HVAC control module and the blower motor. The blower motor speed control, Blower motor speed signal, battery positive voltage and ground circuits enable the control processor to operate. The HVAC control module sends the commanded blower motor speed to the control processor through a 0 to 12-volt linear ramped blower motor speed control circuit. As the blower motor speed control voltage increases, the blower motor speed increases. The control processor sends the actual blower speed to the control module through a 0 to 12-volt blower motor speed signal circuit. The processor supplies 12volts to the blower motor through the blower motor voltage supply circuit. The control processor uses the blower motor ground as a low side control to adjust the blower motor speed.

Nov 19, 2016 | Buick Cars & Trucks

1 Answer

The fans won't stop running in my 2000 Volkswagen Jetta vr6


http://www.partsgeek.com/gbproducts/SC/7446-08008289.html?utm_content=SC&utm_term=1999-2006+Volkswagen+Golf+HVAC+Auxiliary+Fan+Control+Module+Febi+99-06+Volkswagen+HVAC+Auxiliary+Fan+Control+Module+2002+2000&utm_source=google&utm_medium=ff&utm_campaign=PartsGeek+Google+Base&gclid=CNnNmr-pscsCFQmQaQodhqEBLg&ad=47433971532

Mar 08, 2016 | Volkswagen Cars & Trucks

1 Answer

2006blower motor relay


Well there is no relay.
If you have manual control HVAC you have a 30amp and a 40amp fuse for the blower, and an HVAC control module. I think the module is behind the HVAC controls in the dash.
If you have automatic temp controls, you have a processor in addition to the module. The module and the processor both control fan speed.

Sep 03, 2012 | 2006 Chevrolet Suburban

1 Answer

HVAC controls overheating


fan motor most likely at fault, low speeds cause extra heat in motor

May 31, 2012 | Mercury Grand Marquis Cars & Trucks

1 Answer

2006 slt gmc envoy ac problems vent controls anbd


{: ) The popping sound you heard is caused by the sudden movement of an HVAC door, most probably coming from the recirculation door actuator (right dashboard area) or the mode actuator( mid dashboard area). The fan outputs could be normally working, but is being muffled by the incorrect positioning of the HVAC doors, giving an impression that there is fault in the blower controls. In other words, your vehicle is having an air distribution issue.
If there's no conflict in your climate settings, then the trouble may be in the HVAC doors binding or broken, or the actuators faulty or sticking. In both cases, servicing may involve removal of the dashboard to access these HVAC components.

Jul 20, 2010 | 2006 GMC Envoy

1 Answer

2003 Chev Malibu.V6, loaded: HVAC: control head


under the dash on the right side ,look for a plug with 5 wires . That switch is called a RHEOSTAT.(fan speed control).Sounds like it is defective

Apr 05, 2010 | 2003 Chevrolet Malibu

1 Answer

MY HVAC fan stopped blowing. Checked all the


Check the blower motor speed control resistor pack is ok.
(The resistor pack is usually located in the blower fan ducting in the air flow).
Check condition of electrical connection terminals on the blower motor circuit - these terminals pass considerable current and over time may fatigue overheat and loosen.
Check operation/replace any blower motor control relay,
Check the blower motor will run if +12v directly applied to the blower motor.
Check operation of the blower motor speed control switch is ok.

Oct 08, 2009 | 2003 GMC Sierra

1 Answer

88 cadillac deville, ac blower fan wont shut off, even when car is turned off and key removed. I tried disconnecting the battery to reset the system but it still runs when battery reconnected. Also, car...


Ralph,
Most common cause of this is the blower fan (proper name for the fan you refer to) continuing to run is a shorted out Electronic Climate Control Module. This solid state device replaces the older style fan speed resistor block (at about 4 times the price) This unit is found on the top of the HVAC box under the hood. (HVAC means heating, ventilation and air conditioning) The HVAC box is found on the passenger side of the firewall. Look behind the A/C's accumulator. It will have an electrical wiring plug on top of it. It will be fastened to the HVAC box with a few 7mm hex head screws. Very easy to change.
FYI, do yourself a favor and replace the blower fan motor at the same time. The Electronic Climate Control Module usually fails because the motor is drawing to many amps of current. This is because it's bushings are worn out or the brushes are worn out.
This is very common on Cadillacs and Buicks.
Charlie
PS Not sure why car won't start. Either you drained the battery or blew a fuse which controls starting the engine. Need more info regarding the "no start" condition.

Jun 14, 2009 | 1988 Cadillac Sedan DeVille

1 Answer

Only have 1 speed on HVAC fan


the fan relay(resister) that control fan speed is probably burned out.When this occurs it will only blow at high speed because its getting 12volts directly to the fan

May 25, 2009 | 2004 Pontiac Vibe

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