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thermostat problems

zeke Member Posts: 223
If it works on jumping I doubt that it should be a problem when wired properly, since it worke allowing the 31 volts to the relay. Make sure of your wiring.


  • Dan C.
    Dan C. Member Posts: 248
    honeywell t87f

    I am having a problem with one of the new honeywell t87 thermostats with no mercury. If I jump out the thermostat the heat comes on. But when the thermostat is connected it doesn't work. I tried 3 different thermostats. I called honeywell and they said the problem is that I have 31 volts going to the thermostat and the max is 30. I also tried another honeywell programable and it didn't work either. does anyone know who makes a thermostat that will work off of 31 volts? I would rather not change the transformer on the boiler because the wiring is a complete mess and it is a callback even thogh it has nothing to do with anything I did. Thanks.

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  • Glenn Sossin_2
    Glenn Sossin_2 Member Posts: 592
    voltage drop

    Perhaps adding a resistor say 50 - 100 ohms in series into the line coming to the thermostat. Best of my knowledge, that should make a voltage drop sufficient so your thermostat will work.
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