Heater and the air conditioner not working

1998 OLDSMOBILE 88
194,000 MILES • 0.5L • 4 CYL • AUTOMATIC
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SHERRY HILL
  • MEMBER
  • 1 POST
They both were working great, then it started shutting off and on when the knob is turned on. Now both want come on at all. When turn on it doesn't blow and nothing is coming out the vents.
Oct 19, 2020 at 6:06 AM
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ASEMASTER6371
  • ✓ASE Certified Mechanic
  • 52,796 POSTS
  • ASE Certified Mechanic
Good afternoon,

This could be the blower motor or the resistor. You need to test for voltage to the blower motor when commanded to the on position. Check at the connector for voltage.

I attached pictures of the location of the components for you as well.

https://www.2carpros.com/articles/low-or-no-air-flow-from-vents

I attached a wiring diagram for you to view. You will need a test light or voltmeter to do some testing.

https://www.2carpros.com/articles/how-to-check-wiring

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

Roy
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Oct 19, 2020 at 8:21 AM
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