Blower and Heater Controls Do Not Work (Without A/C)

Blower and heater controls do not work

Probable cause: Heater control panel malfunction or faulty power or ground circuits

Check for DTCs using the HDS or the self-diagnostic function How To Troubleshoot The Heating System (Without A/C)

Do the heater control power and ground circuit troubleshooting Heater Control Power And Ground Circuit Troubleshooting (Without A/C)

Also check for

Blown fuse No. 36 (10 A) in the under-dash fuse/relay box

Also check for

Faulty blower motor relay

Also check for

Poor ground at G504

Also check for

Poor or loose connections at the terminals