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Support Questions Posted by romue
Honeywell - Replace Round Thermostat T87f (series 20) With A Programmable Thermostat
I have an old mercury based Honeywell thermostat T87F series 20 covering only heating and want to re...
I have an old mercury based Honeywell thermostat T87F series 20 covering only heating and want to re...
(Posted by romue 10 years ago)