Heater problem
1997 Ford F150 6 cyl Two Wheel Drive Automatic 100000 miles

no heat and overheating. i replaced the t stat and now does not overheat but still no heat. flushed heater core and still only 1 hose gets hot. did not find any leaks could core still be bad or what else can i try. and i let truck run for about 30 min with radiator cap off to bleed air from system. thank you for your help

Hi there ,

If you have good flow through the heater core, i would be checking that the heater tap is OK, did you flush through the tap as well or after it?

Mark (mhpautos)

no i didnt try that but i will today. thanks for the help

i flushed the system. took the t stat back out made sure it was working right. i dont know what else to try. i looked it up in the haynes repair book and i said something about a heater control valve. but didnt say what it was or where its was. got anymore ideas