Climate control

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Old 09-25-08, 10:39 AM
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Climate control

I have a 1999 GMC Envoy 4.3L auto and no power to the climate control , fan, ac, defrost none of the settings work and this just happened one day . All fuses are good indash and engine compartment. Any ideas what could be the problem. And also totally unrelated since its been going much longer than all this started a relay under the dash on the passenger side keeps clicking while driving and intermittantly , anyone knows what this may be? Thanks.
 
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Old 09-25-08, 12:45 PM
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just because the fuses are doesn;t mean they have power check to see if the fuses have batt + with key on u may have a bag ignition switch or fuse panel both which also could cause a relay to click on and off
 
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Old 09-25-08, 04:04 PM
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mech

GM had a problem with the fan control switch,s back than. they heat up and melt the connector for the wire harness on the back side of the switch and cause a draw and cause the relay to go on and off. pull it and look at the wires.
 
 

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