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Carrier 58MVP; Blower on, no heat. Themosta at 75, temp at 69 and furnace still does not come on. Fault code 12

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A code 12 is "Blower on after power-up" Try resetting the furnace with either the Emergency switch or circuit breaker. If it continues, you may need a new control board.

Posted on Nov 28, 2008

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