New Thermostat

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I’m replacing an old Honeywell T451A. When taking off the old thermostat, there is a metal utility box underneath with 2 wires. One wire says common and the other is heat only. Can you recommend a vertical thermostat to cover this old box? Also what these wires correspond to on a new thermostat? Thanks in advance.

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Jason TErry 4 years 1 Answer 627 views 0

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    I answered your question on Youtube

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