Question about 1994 Buick Park Avenue

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Blower for heat/ac does not work

Needs new circuit board for blower control for heat and a/c.

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  • 239 Answers

Open in resistor w/ standard hvac. contorl module w/ auto hvac.
test all and the blower motor itself

Posted on Dec 29, 2013

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Ken17402
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SOURCE: Blower not working on heat

remove electrical connector from blower moter .With car running test voltage at connector if you have 12 volts or better at connector replace blower moter if not check fuse, replace fuse if blown.

Posted on Dec 29, 2010

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1 Answer

What is an AC diode fuse? I have a 2006 AWD Pontiac Torrent the AC/Heat doesn't work, I've changed all fuses for the HAVAC and still no AC/Heat blowing out of vents. What could be the problem?


Could be a number of thing's ! Testing the electrical circuit is the way to find out what's wrong . Using a wiring diagram and a DVOM - digital volt ohm meter . Videos on youtube showing how to test it ! Without testing i would only be guessing . Does it work in high speed ? In high speed it by-passes the resistor . If it doesn't work in any speed more then likely the blower motor is the problem !
Air Speed
The HVAC control assembly applies ground to the blower motor control circuit that corresponds to the selected blower speed. The resistors and the blower motor are in a series circuit. The following list represents the number of resistors in series with the blower motor per particular speed request:
• Low speed--3 resistors
• Medium 1 speed--2 resistors
• Medium 2 speed--1 resistor
When the operator requests High speed, the HVAC control assembly applies ground directly to the blower motor through the high blower motor control circuit. The resistor card has a fusible link which, if blown, will require that the card be replaced.

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If your saying the blower motor doesn't work, turn on the hvac and check voltage and ground at the blower motor connector. Go from there.
Can you check for applicable hvac trouble codes? Some of the national brand auto stores will check codes for free, if there are any.
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1 Answer

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