Climate control suddenly blows cold air with heat on

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Climate control suddenly blows cold air with heat on

01-05-2007, 07:50 PM

ree

Hummer Authority

Join Date: Apr 2005

Location: Ouside MN's 5th Congressional District, MN

Posts: 1,260

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Re: Climate control suddenly blows cold air with heat on

Quote:

Originally Posted by Adam in CO

Radiator problem. Check the coolant level, for leaks, for radiator or hose blockage. No coolant means nothing flowing to heater core. There wouldn't be any codes.

Rebooting the truck would fix a low radiator level or a blocked hose? I'll check, but it seems to infrequent to be this. Also, the coolant temp looked normal in both cases.

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