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Car heater not geting warm - Cars & Trucks

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First of all. check coolant level. One way to tell if the coolant is circulating through the heater core is to feel both heater hoses. Both the inlet and outlet return hoses should feel hot when the engine is at normal operating temperature and the heater is on. some vehicles have a "bleeder" valve (or more than one valve) on the thermostat housing and/or certain hose connections. Opening the valve(s) allows air to escape as the system is filled. The valve(s) should then be closed when coolant starts to dribble out the valve. On vehicles that lack these special bleeder valves, it may be necessary to temporarily loosen the heater outlet hose so air can bleed out as the system is filled. A plugged heater core. Accumulated crud in the cooling system may plug the core and block the flow of coolant. The only cure here is to replace the heater core. if above is ok. replace thermostat.

Posted on Feb 09, 2012

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2 Answers

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