Troubleshooting Hints - Temperature Controls

^ Check HTR A/C IGN Fuse if the air temperature does not change with the Temperature Selector.
^ Refer to Air Conditioning for Heater A/C Control Assembly access.
^ Check for a broken (or partially broken) wire inside of the insulation which could cause the system failure but prove GOOD in a continuity/voltage check (Refer to Troubleshooting Procedures).
^ Check for proper installation of aftermarket electronic equipment which may affect the integrity of the other systems (Refer to Troubleshooting Procedures). Diagnostic Aids