The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - blower fan cuts out on high speed setting

tucsonjwt · 06-07-2016, 05:30 PM

Remove hvac control assembly from the dash and operate the control with the engine on. Wiggle the connector at the back of the hvac control and see if it will operate correctly, at least momentarily. If you can get it to work this way, then buy a new short harness with connector - they are still available from the AC Delco pigtail catalog. The connector/harness dries out over time and will not keep good contact with the hvac control.

06-07-2016, 05:30 PM	#5
tucsonjwt Registered User Join Date: Jul 2007 Location: Tucson, AZ Posts: 3,198	Re: blower fan cuts out on high speed setting Remove hvac control assembly from the dash and operate the control with the engine on. Wiggle the connector at the back of the hvac control and see if it will operate correctly, at least momentarily. If you can get it to work this way, then buy a new short harness with connector - they are still available from the AC Delco pigtail catalog. The connector/harness dries out over time and will not keep good contact with the hvac control.