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Thermostat keeps turning system to off state

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  • May 14th, 2019 11:32 pm
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Deal Fanatic
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Mar 8, 2003
9747 posts
1963 upvotes
Richmond Hill

Thermostat keeps turning system to off state

My Honeywell wifi thermostat recently begins to randomly turn off system, set to heat in the morning, evening it shows system is off. How to tell this is problem with the thermostat or the heat system?

Thanks
2 replies
Deal Addict
Nov 24, 2004
4119 posts
695 upvotes
Toronto
Thermostats are fairly simple in the way that they "talk" to your furnace -- they are basically programmable switches that open or close a few circuits based on the time of day and the temperature in your home. The only things it really controls are "fan on / off", "heat on / off", "cool on / off".

You could temporarily install a cheap "dumb" thermostat and see if the behaviour persists.
Deal Fanatic
Mar 17, 2004
5212 posts
626 upvotes
If you have one that needs a battery, try changing the batteries

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