Mechanical Problems

Possible causes of insufficient heat:

• Inoperative A/C heater control or module (depending on ATC or MTC application).
• Inoperative blower motor system.
• Inoperative engine coolant thermostat.
• Inoperative, obstructed or improperly installed blend-air door(s).
• Inoperative or improperly installed blend door actuator or temperature control cable (depending on ATC or MTC application).
• Low engine coolant.
• Obstructed cowl air intake.
• Obstructed heater system outlets.
• Restricted cabin air filter