Honeywell International YCT31A1002 Economy Standard Mechanical Reviews

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While my old Honeywell lasted some 30 years with the tabs still holding.

This new one has super thin plastic tab rings that broke off when access cover was removed.

I guess I could tape the cover back on, my wife will love that!

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I bought two of those to use as 2-way Thermostat for my Gas Furnace. Works Great! Great Price of $3.99 each for opened box! Decent Quality!

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I wanted inexpensive and I got it. The instruction are really bad. All Honeywell instructions are bad. It does not clearly say that it will not work with electric heat. I bought 5 of them and could not use them in my rentals with electric heat. I then bought the round old style and they work great.

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I bought one of these for a simple 2 wire setup (R and W wires). From the manual it looks like you can use it for that. The first one I installed did not work and the customer service person asked me about my setup, we checked that the wiring setup I had was good (touch red to white to make sure it goes on), but it did not work, so they told me it was defective. I went to get another one, and same thing. The think is, if you look at how it's made, it looks like they have connected the wrong posts -the metal connector that works when you touch the wire to it is not attached to the W wire screw. I tried a different thermostat and it worked fine. So either both of the these CT31A thermostats I bought were defective, or the thermostat was mis-manufactured with a flawed design, or it's not designed to work with a 2 wire setup (though the manual does not say so).

Would love to hear from Honeywell what the issue is with this thermostat.