some days my heat works and some days it doesn't. what can be causing this?

Asked by Mel Dec 14, 2015 at 11:17 AM about the 2003 Hyundai Sonata V6 GLS FWD

Question type: Maintenance & Repair

the other day my heater would not work yesterday it did and today nothing.

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William answered 8 years ago

if the blower is not turning on you may have a melted blower speed switch switch is know to melt on speed 3 and 4 easy test push speed control stitch in and hold it and turn the blower on if turns on the switch is melted, if blower works and no heat check car radiator coolant level if full check thermostat, then all relays and fuses, if none of these fix problem check water pump..

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some days my heat works and some days it doesn't. what can be causing this? 1 Answer

the other day my heater would not work yesterday it did and today nothing.

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some days my heat works and some days it doesn't. what can be causing this?

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some days my heat works and some days it doesn't. what can be causing this?

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