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    keithb505 Posts: 3, Reputation: 1
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    Nov 10, 2010, 05:32 AM
    Transformer fuse popping on my heatpump
    I switched over from ac to heat on the therostat and heat came on for a bit then popped the fuse on transformer, I reset the fuse and reprogramed the thermostat and tried again. Unit cane on for a few minutes then popped again, I can hear a slight humming coming from the transformer don't know if that is normal or not.they came out and changed the thermostat and it fixed the problem.

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