What is wrong with your heater 97 Ford Taurus GL new thermostat new overflow tank no leaks never overheats Heater blows hot air for about a minute then turns luke warm to cold?
heater core plugged under dash
Answer If flushing the heater core doesn't solve the problem, the next step is to check the operation of the blend door. This model has problems with the door breaking and failing to control air flow through the heater core, appearing like the core is bad. Check heatertreater.net for pictures, diagnostic information, and a fix.