First you should feel the heater core hoses, if one is hot and the other isnt, you should flush out the heater core.
If neither is hot you should check your heater control valve (located on the heater core hoses) it shoudl be able to be moved by hand if not replace it. Also if the hose before it is hot but not after it replace it.
To see if ther thermostat is causing it if the upper and lower radiator hose are the same temperature, then there is no problem wotj tje tjer, pstat/
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Saturday, December 29th, 2007 AT 6:09 PM