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Replacement Thermostat Question
mgambuzza
Member Posts: 29
I currently have a "newer" Honeywell round thermostat that I believe has issues. The switches are set properly. For example, with the room temperature showing about 66 degrees, I have to set the thermostat between 72-74 in order to turn on the boiler. If I try to reduce it to 70, as soon as it goes below the 72-74 range it kicks off. If I keep it at 72-74,it will run and maybe bring the system up to 68-70. If I set the temperature to 78 and it brings the system up to around 72.
In a replacement, I was going to see if a could find a new old stock Honeywell T86A (merc), or something similar to get better/more accurate performance. I had to search for a vintage style thermostat a few years ago at my old house to control my pellet stove as newer ones didn't seem to have a good enough "closure" to simulate a short circuit, allowing it to fire up.
In a replacement, I was going to see if a could find a new old stock Honeywell T86A (merc), or something similar to get better/more accurate performance. I had to search for a vintage style thermostat a few years ago at my old house to control my pellet stove as newer ones didn't seem to have a good enough "closure" to simulate a short circuit, allowing it to fire up.
0
Comments
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Make and model of boiler? How many wires in the thermostat cable?Bob Boan
You can choose to do what you want, but you cannot choose the consequences.0 -
Is this a CT87? If so, having it level is critical. Is it?Br. Jamie, osb
Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England0 -
Current one is a Honeywell T87K1007. Yes it is level, and set for Steam/Gravity.Jamie Hall said:Is this a CT87? If so, having it level is cri
tical. Is it?0 -
That’s not a very reliable one. It’s a power stealing model that’s used when they’re only two wires available. You may have better results with a new one.Bob Boan
You can choose to do what you want, but you cannot choose the consequences.0
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