Diesel Data: Automotive Repair

A/C Condenser Fan and/or the Radiator Fan Do Not Run With the A/C On




The A/C condenser fan and/or the radiator fan do not run with the A/C on

Diagnostic Procedure:

1. Probable cause: A/C condenser/radiator fan low speed circuit malfunction

2. Do the radiator and A/C condenser fan low speed circuit troubleshooting Radiator and A/C Condenser Fan Low Speed Circuit Troubleshooting

Also check for:

- Climate control DTCs Initial Inspection and Diagnostic Overview
- Powertrain DTCs Reading and Clearing Diagnostic Trouble Codes
- Blown fuse on the fan circuit:
- No. 3-6 (MAIN FAN MTR) (30 A) in the under-hood fuse/relay box
- No. 3-8 (SUB FAN) (30 A) in the under-hood fuse/relay box
- Poor ground at G301
- Poor or loose connections at the terminals