Question about 1992 Pontiac Bonneville

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The heater/ac blower motor on my 1992 Pontiac Bonneville only works on low and high, not the middle two settings.

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Possibly the swtich is going

Posted on Nov 19, 2009

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I have a 98 bonneville se. the blower fan only comes on when the knob is all the way up and it ONLY blows heat and absolutely no cold also the air only blows out the defroster and the floor


How did you test the A/C system ? Hook up gauge manifold , test A/C pressures ? Manual or automatic climate control ? The blower motor only working on high means the blower motor resistor is bad ! Did you hook up a scan tool an check high an low pressure switchs inputs to the PCM - engine computer . Does the A/C compressor clutch engage ? turning on the compressor ? Moving the mode switch does nothing . Doesn't move from floor to vent to defrost ? Probably the mode door actuator ! Don't think the HVAC control panel is bad . Just a few little things . Pushing the A/C button on the control panel just send a electrical signal to the PCM , the PCM will energize the A/C clutch relay , turning on the compressor .

The Trainer 40 When the compressor won compress

Blower Motor Problems Auto Repair Help

Do you know how to test automotive electrical circuits ?

Heater Blower Motor Troubleshooting


May 19, 2017 | 1998 Pontiac Bonneville

1 Answer

Where is the heater blower resister located on a 2004 bonneville gxp


Why ? Does the blower work on high ? but no other speeds ! If it doesn't come on at any speed it's not the resistor . Does the vehicle have automatic climate control or manual ? Automatic doesn't have resistor , has a blower motor control processor . HVAC Blower Motor Circuit You need to test , not guess !

Feb 04, 2017 | 2004 Pontiac Bonneville

1 Answer

1994 pontiac boneville blower fan motor dont work on high


Automatic or manual heater control. Automatic is the one where you set the temp to a certain degree and it maintains that temp. Manual has the temp control on a dial or levers.

Apr 05, 2013 | 2001 Pontiac Bonneville

1 Answer

My 1997 bonneville heater fan has no power at plug check all fuses under hood on firewall can you tell me were I can look thanks


You may need to get a blower control module. It's in the heater/ac case close to the blower motor

Dec 09, 2010 | 1997 Pontiac Bonneville

1 Answer

1992 bonneville sse w/ac replaced blower motor +


You replaced the blower control module or the blower control panel on the dash? This has automatic temp control right?

Mar 31, 2010 | 1992 Pontiac Bonneville

1 Answer

My heater blower only works on high and low speeds. Computer problem?


IT COULD BE THE BLOWER MOTOR SPEED SWITCH OR THE RESISTOR.

Sep 01, 2009 | 1990 Pontiac Bonneville

2 Answers

Heater blower motor works intermittently


I would replace the blower motor, this sounds like a motor brush problem inside the motor itself.

Jan 24, 2009 | 1993 Pontiac Bonneville

1 Answer

92 bonneville. The heat suddenly stopped blowing at low or high.


jump 12 volts to the blower motor connector and see if it runs, if it does replace te blower motor speed control module

Dec 16, 2008 | 1992 Pontiac Bonneville

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