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OT: Furnace Blower Problems
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Posted by Buzzman72 on June 05, 2006 at 06:45:50 from (4.89.128.57):
I have an LP furnace and central air conditioning unit in my house. The furnace was replaced 9 years ago. It's a Bard, model MPG100D48C. Probelm I'm having that the blower quit working a couple of weeks ago. On the HEAT side, the electronic pilot lights, and the burner lights, but the blower simply won't start. On A/C, the condenser fan starts, the compressor runs and the evaporator gets cold, but the blower won't start. The unit has an electronic control box with a green diagnostic LED; LED never blinks a trouble code; just goes bright/dim, which the chart says indicates "normal operation." Obviously, with the blower not working, it is definitely NOT "normal operation." The other night I accessed the blower itself, and the motor spins freely by hand, so the motor's not locked up. I'm planning to pick up a digital volt/ohm/amp meter today to check and see if there's current to the blower from the electronic control box. Since I'm no furnace mechanic, what else should I check? Filters get changed every 30-45 days, so there's no problem there. Any help or advice would be greatly appreciated, since funds are low [otherwise I'd have called a repair person weeks ago].
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