My AC/heater will only blow on the highest setting. Level 5. How can I repair it
2004 CHEVROLET AVALANCHE
This problem began approx. A week ago.
have the same problem?
Tuesday, October 18th, 2011 AT 12:53 PM
With automatic hvac check for applicable trouble codes. If the hvac module detects a problem, it will default to defrost. Some of the national brand autostores used to check some codes for free. I haven't looked at your wiring, yet.
Tuesday, October 18th, 2011 AT 2:09 PM
I did find a TSB possibility. The hvac control harness may rub against a sharp edge of instrument cluster brace, causing the actuator control to short.