American Cars
Pontiac Bonneville
Car Heaters
Physics

Low heat output 1998 Pontiac Bonneville?

Answer

User Avatar
Wiki User
10/07/2007

Low coolant?

Partially plugged heater core?

Thermostat defective opening too soon?

Control cable not adjusted properly?

Water pump not circulating water?

System airbound?

Defective radiator cap not building suffient pressure?