Question about Chevrolet Cars & Trucks
Posted by Anonymous on
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Posted on Jan 02, 2017
Cooling System Mix
Coolant level low or flow is restricted.
Thermostat stuck closed
Heater Control Valve
Leaking or defective heater control valve.
here something to help u
Here to help Shaun
Posted on Nov 23, 2008
SOURCE: Heater blows cold air when idle
Sounds like you may have a partially plugged heater core. You could flush this out separately, from flushing radiator & engine block. Diconnect heater hoses going to your heater core and clamp off, so not to loose coolant from engine. Now hook up separate hose to one side of heater core pipe and flush out with typical garden hose. Repeat procedure on both heater core inlets. Reconnect original heater hoses and test difference. You may have to add an additional litre of antifreeze. If this don't work i suggest changing heater core. Good luck.........Ron.
Posted on Jan 03, 2009
Had the same problem with my Mazda6 awhile back. Took it to the dealer and they found the radiator wasn't holding pressure. They replaced the whole radiator under warranty (WHEW!). Not sure how to check for that kind of thing, but it's a start.
Posted on Feb 02, 2009
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