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The motherboard on our air conditioner is out. This has caused of problems because the motherboard is not the first thing the air-conditioning guys look at. No, first we replaced the thermostat. Then the wiring harness. Then they check the house electrical before realizing that it was a bad motherboard.
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If you must have a motherboard in the air-conditioner it should be...
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NO! Here is the thing, a motherboard in the air-conditioner isn't a "must have". They have been making air-conditioners for years without a mother board..
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argh!