PONTIAC HEATER NOT WORKING

No Heat, Or Heat For A Little While, Then No Heat. It Has A Front And Back Heater Core. Thermostat Is Not Sticking. Vehicle Runs At Normal...

The Last Mechanic That I Took My Van To Replace The A/c Compressor Because The System Was Only Blowing Heat. He Told Me I Was Going To Need...

The Car Provides Some Heat But It's Not Enough In Very Low/cold Temperatures. The Car Doesn't Overheat Or Have Any Coolant Leaks. I...