Question about 2000 Chevrolet Silverado 1500

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Heater/defrost doesnt blow hot heater hoses one

Heater/defrost doesnt blow hot, heater hoses one side hot other cold
thermostat has been changed
4.8 engine,fuses have been checked
engine is circulating water fine
temp is 205

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The heater core is probably clogged. The best method i have found is to remove the heater hoses, and blast compressed air into one side or the other in short bursts. This will tend to launch a clump of sludge out of the other side, and is very messy. Once the heater core is unclogged and reconnected, it is a good idea to chemically flush the entire cooling system, then flush with clean water and refill with universal coolant.

Posted on Nov 18, 2009

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Posted on Jan 02, 2017

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robert

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