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Several possibilities:
(1) the cooling system thermostat has failed and is in the 'open' position not allowing the coolant to warm up sufficiently to heat the interiror.
(2) the cooling system is clogged, or the heater hoses are clogged, with dirt/debris/sludge not allowing the coolant to circulate heat into the interior radiator.
(3) the control which is designed to regulate the interior heat by regulating the flow of coolant and air into the interior has failed.
(4) The interior circulating fan has failed and is not circulating the warmed air.
Probably the best and easiest place to start is checking your fuses to make sure that all fuses having to do with the heating/coooling systems are good. Other than that, for the remainder, you're probably looking at a mechanic to diagnose the other possibilities.
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∙ 13y ago
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