what causes the fan motor to fluctuate while driving? my heater works so does the a/c

185

Asked by Mar 13, 2013 at 01:19 AM about the 2002 Pontiac Grand Prix GT Coupe

Question type: Maintenance & Repair

2002 Pontiac Grand Prix GT 2dr 3.8L 239k

5 Answers

well there is a little goodie called the 'fan clutch' in front of the radiator, in fact is an additional fan...sorta, speeds up when the moto is hot, and cools down when the motor is cool. It's job is to vary with temperature.

Best Answer
94,825

If you are asking about the blower fan motor for the HVAC system, it means that the brushes are too short and the motor needs to be replaced. It's a very easy DIY job on most GM vehicles. Three small screws and a electrical connector.

2 out of 2 people think this is helpful.
Best Answer

oops-

Best Answer
94,825

I see green! Happy St Patrick's Day!

wow. points!!!

Your Answer

Add photo

Related Questions

  • Heater not getting hot 24 answers

    I have a 2005 pontiac grand prix. Heater fan works, but blows cool air. We replaced the thermostat but that didn't make a difference. What else could be wrong besides the heater core? Is there any...

    2005 Pontiac Grand Prix GT

    -

    Maintenance & Repair

  • cooling issues, fans wont start 8 answers

    98 grand prix,3.8,. had a blown head gasket, removed the heads had a valve job done, and replaced all gaskets involved with replacing the heads. also replaced radiator, water pump, tstat, ect sensor, ...

    Pontiac Grand Prix

    -

    Maintenance & Repair

  • Cooling fans won't come on 2 answers

    Have 07 Pontiac Grand prix 206,000 mi. Just recently the cooling fans won't come on. Of course when I'm driving temp gauge is OK when idling temp gauge rises almost to red line. I've replaced wate...

    2007 Pontiac Grand Prix Base

    -

    Maintenance & Repair

  • I have lights on heater controls and replaced a burned out blower motor but it will not work. any ideas? 1 answer

    2006 Pontiac Grand Prix Base

    -

    Maintenance & Repair

  • heater fan speed intermittant 1 answer

    HEATER FAN WORKS THEN DOES NOT WORK

    2007 Pontiac Vibe Base

    -

    Maintenance & Repair

Grand Prix

Looking for a Used Grand Prix in your area?

CarGurus has 2,937 nationwide Grand Prix listings starting at $879.

ZIP:

Search Pontiac Grand Prix Questions

Pontiac Grand Prix Experts

#1 Js08016
Js08016
Reputation 4,070
#2 Tom Demyan
Tom Demyan
Reputation 2,700
#3 munron
munron
Reputation 2,110
View All

Related Models For Sale

Used Chevrolet Impala
618 Great Deals out of 29,205 listings starting at $1,300
Used Pontiac Bonneville
527 listings starting at $1,695
Used Chevrolet Monte Carlo
8 Great Deals out of 1,402 listings starting at $2,588
Used Chevrolet Malibu
799 Great Deals out of 88,549 listings starting at $1,900
Used Pontiac Grand Am
1,325 listings starting at $799
Used Ford Mustang
300 Great Deals out of 45,096 listings starting at $2,000
Used Chevrolet Camaro
158 Great Deals out of 35,580 listings starting at $1,995
Used Nissan Maxima
273 Great Deals out of 25,882 listings starting at $2,589
Used Pontiac Firebird
10 Great Deals out of 798 listings starting at $1,800
Used Nissan Altima
759 Great Deals out of 77,507 listings starting at $470

Used Cars For Sale

2008 Pontiac Grand Prix For Sale
12 Great Deals out of 428 listings starting at $2,495
2007 Pontiac Grand Prix For Sale
5 Great Deals out of 431 listings starting at $1,595
2006 Pontiac Grand Prix For Sale
4 Great Deals out of 442 listings starting at $1,999
2005 Pontiac Grand Prix For Sale
357 listings starting at $2,999