Heater blows hot air for a few minutes and then blows cold air

Asked by HannahHaas Nov 21, 2020 at 11:22 PM about the 1998 Ford Expedition 4 Dr XLT 4WD SUV

Question type: Maintenance & Repair

Just changed the thermostat and flushed it. Took it
to a mechanic had them did the SAME EXACT
THING and the heater will blow hot air for like 2
mins and then it turns cold until I shut off the
heater for a few minutes and then turn back on

1 Answer


My 97 expedition was doing a similar situation, does it "thump" around the passenger floorboard? I was suspicious of the actuator that controls the flap to decide if heat or cool air comes out of the vents

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