MY HEATER IS BLOWING COLD AIR

1999 Ford F-150

Tiny

codyo32

October, 27, 2012 AT 6:15 PM

My heater is blowing cold air

FOUND 6253 RELATED QUESTIONS

No Heat

37 ANSWERS
5 IMAGES

5 Answers

Tiny

JDL

October, 27, 2012 AT 6:18 PM

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.

Tiny

codyo32

October, 27, 2012 AT 6:22 PM

Yes the hoses get hot and engine runs normal

Tiny

codyo32

October, 27, 2012 AT 6:24 PM

I have drained my radiator and replaced my temp switch. Could I have to much water in my coolant still?

Tiny

JDL

October, 27, 2012 AT 6:32 PM

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.

Tiny

JDL

October, 27, 2012 AT 6:41 PM

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.

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