Blows warm air for a couple of minutes

BEERBUSTER64

MEMBER
1999 FORD F-150
124,000 MILES

Why dont I have proper heat in my f-150 when engine is warm I can turn on heat but it only blows warm air for a couple of minutes and then goes cold but if I rev up the engine to about 3000 rpm it will blow warm air again.

heater problems

2 Replies

FIXITMR

MECHANIC
9,990 POSTS

It sounds like the heater control valve might be bad or the coolant level is low.

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Saturday, November 12th, 2011 AT 12:50 AM

FIXITMR

MECHANIC
9,990 POSTS

Here's diagram

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