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    anson73 Posts: 2, Reputation: 1
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    Jan 1, 2011, 09:50 PM
    Honeywell TH8000 Thermostat
    The TH8000 thermostat controls a Unitary Products Group heat pump, and Nordhyne furnace. Everything is working fine... we think. BUT, why does the heat pump run when outside air temperatures are below zero degrees F? Should we be using a different System Setting on the TH8000 when OAT falls below zero F?

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