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1988 Chevy Astro heater switch

Tiny
OLIVIA9898
  • MEMBER
  • 1988 CHEVROLET ASTRO
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 300,012 MILES
I have replaced the blower motor on my heater and also replaced the switch inside that turns it off and on and it still does not blow out when you turn it on. I don't know what eles to check. It gets hot and you can feel it coming through the vents you just can't turn it off or on. What should I check next? This is the second motor and the air is not on there anymore.
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Monday, November 10th, 2008 AT 11:47 AM

6 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,700 POSTS
Is there power coming from the switch? Is power getting to the motor? Did you replace the blower motor resister?

Let me know.

Joe
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Wednesday, November 12th, 2008 AT 11:56 AM
Tiny
OLIVIA9898
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Hi Joe, thanks for your response to my question. Yes there is power on the inside and outside. We checked it with a tester, and put a new blower motor on it, an a water pump that went out. I also put a new control switch on the inside. You can feel the heat coming through the vent. What do you mean by resister?
Thanks
Mary
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Wednesday, November 12th, 2008 AT 7:42 PM
Tiny
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  • MECHANIC
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Hi Mary:
The blower motor resister is where the power goes from the switch before it gets to the blower motor. It could cause the blower motor to not function. The resister is located on a bracket on the right (passanger) side. I tried to upload a picture of it for you. I hope it works. (first try)


https://www.2carpros.com/forum/automotive_pictures/249084_graphic_resister_1.jpg

of the engine compartment.

Let me know if you get the picture and if it helps. Let me know if you don't get it and email me with you email and I'll send it as an attachment. (if you need it)

Joe
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Wednesday, November 12th, 2008 AT 10:51 PM
Tiny
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Hi Again, Mary. Sorry, I sent you the picture of the relay. There is no picture of the resister. However, I can tell you it is located in the blower housing near the motor.

Joe
Sorry about the confusion. Computers drive me nuts.
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Wednesday, November 12th, 2008 AT 10:56 PM
Tiny
OLIVIA9898
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Thanks again. We got it fixed the ground wire wasn't grounding. Thanks 4 your help.
Mary
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Friday, November 14th, 2008 AT 11:49 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
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Hi:
Great news! A bad ground will stop anything. If you every have any questions in the future, let me know. Also, where was the bad ground located and how did you find it?

Joe
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Friday, November 14th, 2008 AT 1:17 PM

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