86 Blazer heater resistor

1986 CHEVROLET TRAILBLAZER
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TBJ
  • MEMBER
  • 1 POST
I have an 86 full size Blazer 140,000 miles with a 350 that I have to keep changeing the resistor for the heater. after about a month when you turn it on it only works on high after you tap on the heater solinoid. After replacing the resistor it works fine
Feb 16, 2007 at 4:39 AM
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CHEVY22
  • ✓Experienced Mechanic
  • 1,375 POSTS
hi
i would check the wiring to the resistor, fan and switch for shorts , there is a problem there somewhere causing the resistor to fail

jim
Feb 16, 2007 at 4:36 PM
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CHEVY22
  • ✓Experienced Mechanic
  • 1,375 POSTS
could be but the best thing to do is check resistance on both this will tell you where you stand ,
Feb 22, 2007 at 9:33 PM
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