Question about Cars & Trucks
Check for blown fuse. Check for fan not spinning fast or binding, check wires and cables for loose or bad connections. That's all I can think of. Good luck.
Posted on Jul 25, 2013
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Posted on Jan 02, 2017
SOURCE: 1999 1500 silverado heater
Sounds like the blend door in the ducting has failed, this door is what controls the temp of the outlet air by blending heat and outside air or AC cooled air.
Posted on Nov 07, 2008
No your thermostat is stuck open which will not hurt the engine. but needs to be replaced, the thermostat is what allows the engine get up to operating temp. before allowing water to flow through the radiator and when it is stuck open it doesnt allow the engine to reach operating temp. so the heater never gets hot. I hope that helps you out.
Posted on Nov 24, 2008
I have the same problem exactly, if i turn off the ignition and then turn it back on it begins blowing cold air again. I would like to know what the problen is as it sounds like it is not unique to just my vehicle.
Posted on Oct 10, 2009
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