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'99 Chevy prism 49K miles heater only works in position

Tiny
MIKE9
  • MEMBER
  • 1999 CHEVROLET
AC & Heater only work in hi position. Is is blower motor, blower resistor, relay, switch, or what?

Thanks for your insight.
Monday, December 11th, 2006 AT 11:40 AM

8 Replies

Tiny
CARUNDELL
  • MECHANIC
  • 602 POSTS
Hey mike,
More than likely the blower resister, some models were changed to the solid state style and not the old wire resistor style and they fail quite often.

Chris
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Monday, December 11th, 2006 AT 12:35 PM
Tiny
MIKE9
  • MEMBER
  • 5 POSTS
Thanks Chris. That's good to hear since I was thinking that if the resister failed it might be due to a bad blower with lower than acceptable resistance forcing me to get a new blower motor as well. I hope that you are right. How common is it that you need to replace both the blower motor as well as theresister?
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Monday, December 11th, 2006 AT 1:00 PM
Tiny
CARUNDELL
  • MECHANIC
  • 602 POSTS
Mike,
Not very common, and a good indicator that all is ok is that your blower works fine on high speed. It is pretty common for those resistors to go as they are solid state and were not sealed very well and the slightest bit of moisture would cause corrosion and failure

Chris
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Monday, December 11th, 2006 AT 1:12 PM
Tiny
MIKE9
  • MEMBER
  • 5 POSTS
Many thanks foryour sound advice!
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Monday, December 11th, 2006 AT 1:25 PM
Tiny
CARUNDELL
  • MECHANIC
  • 602 POSTS
My Pleasure Mike! And pass the word around about this forum ! The more the merrier!
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Monday, December 11th, 2006 AT 1:28 PM
Tiny
MIKE9
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Will do! Thanks again!
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Monday, December 11th, 2006 AT 2:54 PM
Tiny
MIKE9
  • MEMBER
  • 5 POSTS
Hey Chris & Carundell :D,
Just wanted to let you know that you were absolutely right! Replaced the Blower Motor Resistor and everything works fine. There was an open circuit in the blower resistor.

You reallly know what you're talking about!

This is an amazing and excellent service that you provide. Happy Holidays!

Mike
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Wednesday, December 13th, 2006 AT 11:50 AM
Tiny
CARUNDELL
  • MECHANIC
  • 602 POSTS
Mike,
Thanks so much! All these guys here are great, they really know what its all about.

Chris
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Wednesday, December 13th, 2006 AT 4:33 PM

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