Heat/AC fan works in HI only

GMC C1500
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BANANAPEELE
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  • 1 POST
I have a 1995 C1500 4.3L with 158000. Recently the heater/AC fan stopped working except in Hi, I thought it was the control module but after I replaced the problem continued, could the problem be in the hi blower relay? If so where is the relay located and if I need to remove the dash what is the easiest way?

Thanks,
Jan 15, 2006 at 1:39 AM

What to check next

Diagnostic guidance. Suggested checks and possible repairs are separate from the owner's reported results.

Ask for testing of the blower-speed resistor and associated circuit before replacing more parts. Explain that high speed works and that control-module replacement made no difference.

Guidance references and applicability

Source: Original question and visible replies. Owner reports and other participants' experiences are distinguished. Next steps are editorial guidance for obtaining diagnosis or clarifying the reported findings; they are not a verified repair procedure or an independently confirmed component diagnosis.

Read the replies · Discussion summary and reported outcome

AI-ASSISTED GUIDANCE · REVIEWED BY 2CARPROS
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CHAMPION843
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  • 4 POSTS
It's more then likely the resistor, the part that gives you the right power for the variable speeds
Jan 15, 2006 at 2:37 AM

Discussion summary

Heat/AC fan works in HI only

A 1995 Chevrolet C1500 4.3L had heater and air-conditioning blower operation only on high. Replacing the control module had not corrected the problem.

Reported outcome: No subsequent test or repair result was reported.

A reply suggested the resistor. The thread does not confirm its failure or provide a verified component location or dashboard-removal procedure.

Read the original discussion

AI-ASSISTED SUMMARY · REVIEWED BY 2CARPROS
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