Question about Cars & Trucks
Loosend off nuts on HWC to purge air got hot water up to that point but when closed went cold still no circulation?
Posted by Anonymous on
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Posted on Jan 02, 2017
Check the 'heater control valve'. This valve opens when u turn on the heat switch on the dash, so the hot coolant will flow thru the heater core and provide heat. So although the coolant is circulating in the engine, the valve controlling the flow to the heater core is stuck closed, or not working.
Posted on Nov 15, 2008
SOURCE: 2003 sable heater not working
Warm up vehicle. Then, from the engine compartment, grip each heater hose to check if they are HOT. Not warm HOT. If they are both hot, then the BLEND DOOR is stuck to the cold position. Access this thru glove box area.
If they are not HOT, then check radiator hoses for proper heat. If radiator hoses are not HOT then thermostat is stuck OPEN.
If they are HOT then there may be a restriction in circulation to the heater hoses and heater core.
Posted on Dec 15, 2008
you should have hot water on all rad. hoses when the motor is running at a norm. temp. the water is not going through the heater core like it should. you have cutoff valve bad low water are a stopped heater.try a hoter thermostat if none of the above are true.
Posted on Jan 18, 2009
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