Question about Honeywell Thermostat Ct31a Heat & Cool Non Programmable

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Home furnace erratic

Replaced old with this thermostat and was working at first but then the heater would turn on and off, work for a while then quit. Noticed a small resistor was broken and wondering if this could cause the problem I am having.

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Did you keep the old thermostat? I prefer them. New ones want batteries, and can get complicated.

Posted on Nov 26, 2013

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SOURCE: digital thermostat not working

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Posted on Sep 15, 2008

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SOURCE: I replace limit switch on my furnace heater with a wrong one and my thermostat sparked. My heater won't turn on now. What can I do?

Csn you check the 5 amp fuse on the Furnace control board to see if its blown?

Posted on Dec 11, 2012

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