Troubleshooting Hints - Air Delivery & Temperature Controls

1. Check for vacuum to the heater-A/C control.
2. Check the LOW BLOWER Fuse in the fuse block for an open. If open, check for a short to ground in circuit 141.
3. Check the HVAC Fuse in the fuse block for an open. If open, check for a short to ground in circuit 41.
4. Make sure G200 is clean and tight.
5. Move the temperature control to full COOL and then full WARM. Listen for the sound of the electric actuator moving the valve through its full range.
^ Check for a broken (or partially broken) wire inside of the insulation which could cause system malfunction but prove GOOD in a continuity/voltage check with a system disconnected. These circuits may be intermittent or resistive when loaded, and if possible, should be checked by monitoring for a voltage drop with the system operational (under load).
^ Check for proper installation of aftermarket electronic equipment which may affect the integrity of other systems. Refer to General Troubleshooting Procedures. Diagnostic Aids
^ Refer to System Diagnosis.