Heat in my van only last 2 or 3 minutes

Asked by Oct 13, 2018 at 03:56 AM about the 1993 GMC Safari 3 Dr SLE Passenger Van

Question type: Maintenance & Repair

My question is I own a 1993 GMC
Safari with a 4.3 L V6 once the
van is up to operating temperature
I turn my heat on it'll blow hot for
about 2 minutes and then it gets
cold again why is it and what can I
do to fix it

1 Answer

5,280

It could be the blend door under the dash not moving to the heat position or a plugged heater core. When you move the temp lever from cold to hot can you hear the door move under the dash, I've never had much luck flushing heater cores and end up replacing them.

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