Question about 2002 Chevrolet Suburban 2500

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Heater not heating on 2002 suburban fan blows just does not heat up any ideas culd it be a relay switch

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No, Relays control the fan running. But you said it is running. Low coolant level, clogged heater core or sticking temperature door could be the problem. Is the engine running at normal temp? Open thermostat could cause low temperature.

Posted on Feb 05, 2010

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Try changing your thermostat first if that doesnt work flush your system it could be clogged and then if that doesnt work it is pointing to your heater core and it might have to be replaced

Posted on Feb 05, 2010

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