Question about 2000 Chevrolet Silverado 1500
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
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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