Mechanics

FORD F-150 DOOR PROBLEM

1999 Ford F-150 • 177,000 miles

My heater is blowing cold air
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Codyo32
October 27, 2012.



Do the heater hoses get hot? Does the engine reach normal operating temp? Another possibility is a directional door under the dash that isn't operating properly? I didn't check to see if you might have any hvac trouble codes.


JDL
Oct 27, 2012.
Yes the hoses get hot and engine runs normal


Tiny
Codyo32
Oct 27, 2012.
I have drained my radiator and replaced my temp switch. Could I have to much water in my coolant still?


Tiny
Codyo32
Oct 27, 2012.
You need to check the temp door actuator. It is electric, there is a fuse for that. Check voltage and ground for temp door actuator.


JDL
Oct 27, 2012.
Here part of diagram. See the #7 at the actuator, that is voltage, goes hot with key on, Check fuse 5-- 15amp. The black wire is ground. The other three wires are from the potentiometer/heater control.


JDL
Oct 27, 2012.