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Q: Heat and ac blower will not come on on 2003 Volvo S40

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Regardless of what mode or fan speed, I believe it may be associated with the temp control thermostat
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Simple thing to check are the fuses under the hood then the fuses under the driver's left foot, then proceed to something more difficult like checking for power for the the blower motor resistor or blower motor or climate control panel. Good luck, Sam
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