06 hummer h 3 overheating and no heat. I've replaced the water pump, radiator and the

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Nov 3, 2022 | 06:32 AM

Engrfer

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Joined: Nov 2022

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06 hummer h 3 overheating and no heat. I've replaced the water pump, radiator and the

06 hummer H3 overheating. I've replaced the water pump, radiator and thermostat. the top hose is hot hot but the bottom hose is cold and seems no coolant. Please help. Thank you.

Nov 3, 2022 | 07:13 AM

Mammoth H3

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Joined: Oct 2022

Posts: 81

Did you have this problem before replacing the parts? If not make sure the thermostat is not backwards.

Nov 3, 2022 | 11:25 AM

TAINTER

Senior Member

Joined: Sep 2008

Posts: 6,126

From: SE Michigan

Bad Tstat (I've seen brand new Tstats that won't open) is the only thing it could be if the upper radiator hose is hot and the lower is not.

Nov 3, 2022 | 01:10 PM

Doc Olds

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Joined: Jul 2007

Posts: 13,090

From: Boat Town USA MI

why the big azzed bold print?

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