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  1. #1

    Resistors for power stealing thermostats

    I am replacing the manual thermostats on a 3 zone boiler heating system with Honeywell T8775A 1009 non-programmable digital thermostats. The new thermostats came with a resistor pack that included instructions to install when using Taco zone valves. I have Honeywell V8043E1012 zone valves; do I still need to install the resistors?

  2. #2
    Join Date
    Dec 2007
    personally, I do not use power stealing stats anymore. I only use powered, either with a common or batteries.

    they can lead to too many issues.
    The Food Stamp Program, administered by the U.S. Department of Agriculture, is proud to be distributing the greatest amount of free meals and stamps EVER.
    Meanwhile, the National Park Service, administered by the U.S. Department of the Interior, asks us to "Please Do Not Feed the Animals". Their stated reason for this policy "... the animals become dependent on handouts and will not learn to take care of themselves."
    from an excerpt by Paul Jacob in Sun City, AZ

  3. #3
    Join Date
    Dec 2002
    in a house, Appomattox, Va.
    same here, all sorts of weird problems.

    one of installers was given the same tstat three times- and three times I had to go out and replace w/ pro 3000 or 5000. 4th time he got it he threw it in dumpster an used a different tstat he found in parts room.
    Col 3:23

    questions asked, answers received, ignorance abated

  4. #4
    Join Date
    May 2000
    Indianapolis, IN, USA
    Usually not with zone valves. Most common with a furnace board. But ya never know.

  5. #5
    Thanks! Have them installed and operating now. I'll give them a little time and see how they work. Just a little concerned about what happens when more than one zone calls for heat at the same time.


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