2000 Chevy Prizm has a heater fan that only works on high

hawkspiral
25

Asked by hawkspiral Jan 22, 2013 at 02:39 PM about the 2000 Chevrolet Prizm 4 Dr LSi Sedan

Question type: Maintenance & Repair

This only started a few weeks ago.  The heater works ok but the switch that determines the force of the heat blowing only works on high.  I'm thinking it might be the resistor thats bad but how do I know it's not the blower motor or heater relay?

8 Answers

tenspeed
51,025

If it was the motor or relay, it wouldn't work at all. It may be different for the Prizm but the other GM models have two heater blower circuits. One for the lower speeds and one for the high speed. They generally do not have a relay. Check the fuse box for a blown fuse. If all the fuses are good, you probably need a replacement resistor.

2 out of 2 people think this is helpful.
BearWalker
20

I agree with tenspeed

John Saffrahn
15,365

Tenspeed is correct about the wiring. The lower speeds are fed through the ignition switch. My cousins boyfriend has an 01 grand prix that had a similar issue. The dealer wanted $400 for the replacement heater head unit. Every time it was set to 1-4 the auto daytime running lights would shut off. Everytime the seat heater was turned on the DRLs would again shut off. 5 was the highest setting and it worked fine. Traced the wires back to the ignition switch which was only putting out 3.5 volts. It was enough to activate the daytime running light relay but not the seat heater module or blowers lower speeds and the extra draw from it removed the required power to run the DRLs. Key on engine off check all the fuses under hood and in car for battery voltage with a DC volt meter. It's really easy to check and will give you a positive answer

1 out of 1 people think this is helpful.
Riccardo Bartolomeo
405

Resistor

Daddy_1931
30

It's a resistor, if it was the motor it would not run at all, the resistor is lien for lower levels. No resistor is needed for high level as the motor runs at full power

2 out of 2 people think this is helpful.
Jamie Adams
155

agreed on the resistor ..it controls the fan speeds 20 dollar part located right beside the blower motor

1 out of 1 people think this is helpful.
John Blank
40

Its the resister pack located behind the glove box and it probably bad. There are two bolts at the bottom of the glove box down close to the floor. One is hidden behind the side panel that covers the ECU. Then open the glove box and remove the three screws at the top. The resistor pack is just left of the blower motor that is held in by two screws. Replaced one today on my dads 2001 Chevy Prism. I think it cost $37.00 PLUS TAX. jb

2 out of 2 people think this is helpful.
lvmygsd
0

I am here looking for how to get at the fan itself. About 5 years ago a guy was working on my car and noticed my fan only was working on the 2 highest speeds. He pulled out a bunch of shredded paper and crap a mouse had packed in there!! Well it started again this past winter, and recently I lost the 2nd highest speed. If it is paper I don't want to start a fire. Could I?

Your Answer

Related Questions

Prizm
Looking for a Used Prizm in your area?
CarGurus has 247 nationwide Prizm listings starting at $1,995.
ZIP:

Search Chevrolet Prizm Questions

Chevrolet Prizm Experts

#1 tenspeed
tenspeed
Reputation 70
#2 PhilipG
PhilipG
Reputation 50
#2 habana28644
habana28644
Reputation 50
View All

Related Models For Sale

Used Toyota Corolla"
1,331 Great Deals out of 45,839 listings starting at $990
Used Honda Civic"
868 Great Deals out of 48,400 listings starting at $1,295
Used Ford Focus"
1,708 Great Deals out of 57,737 listings starting at $995
Used Toyota Camry"
2,029 Great Deals out of 74,486 listings starting at $999
Used Chevrolet Cavalier"
32 Great Deals out of 2,432 listings starting at $799
Used Jeep Cherokee"
59 Great Deals out of 38,737 listings starting at $1,500
Used Mazda Protege"
10 Great Deals out of 497 listings starting at $1,499
Used Cadillac Escalade"
265 Great Deals out of 7,050 listings starting at $1,595