1997 Ford F-150 4x4, automatic transmission w/approx 150K miles will blow heat through floor vents fine (now) but when you turn it to dash vents it blows hot for about 1 minute then turns cold. I didn't have any heat at first but I have flushed the radiator & core system, replaced the antifreeze & put on a new thermostat. I keep reading about a heater control valve, if my truck has one I can't find where it is & didn't find it in the Chilton book. Does anybody have any suggestions? Thanks for any help.
have the same problem?
Thursday, October 18th, 2007 AT 8:30 PM