I just bought this 98 Expedition and the heater is blowing cold, just replaced thermostat, and I am trying to figure it out.. Could it be the heater control valve?
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1998 Ford Expedition Question: Heater not working..
DaveJHM November 10, 2010, 01:22Master
There is no "heater control valve" on an Expedition.
Instead, after you verify there is hot coolant going into and coming out of the heater core, look inside the vehicle. You may have a temperature blend door actuator failing. This operates the door between heat and air conditioning and could be inoperative.
Answer #2Visitor, November 13, 2010, 14:09
the heater is not work
Answer #3Visitor, December 08, 2010, 08:28
If you have the 4.6l engine there is not a heater control valve but if you have the 5.4l engine there is a heater control valve but location is very hard to find, I have searched everywhere!!!
Reply98Expo, December 28, 2010, 10:20Rookie
yea its hard to find because u have to take the dash board off its behind there
ReplyDaveJHM, December 29, 2010, 00:12Master
The temperature blend door actuator is behind the dash.
A "heater control valve" is a valve that works in lieu of a electric blend door actuator on some cars. The Expedition does not have one. Neither the 4.6L or the 5.4L.
Answer #4Visitor, January 05, 2011, 22:22
check for vacume leaks .... ours has BIG problems with vac leaks