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Rmack1's avatar
Rmack1
Explorer
Nov 05, 2017

Furnace anticipator

I had the control board on my furnace replaced, which fixed it, but before that I tried a new thermostat.

The new one, like the old, had an adjustable anticipator. This is a little dial on the inside of the thermostat that adjusts the amps, or something. The manual said to set the thermostat anticiptor to .7 amps, which I did.

The thing is; my furnace now goes on and off several times sometimes before settling down and running. I tried adjusting the anticipator .05 amps at a time, like the manual says, to .8 and .6, but all settings seem to produce a stutter before the furnace decides to stay on.

Should I just try further settings on the anticipator?

24 Replies

  • Get this;

    I just set the anticipator to .8 and it seems to be running fine now.

    I think I was being too conservative, and didn't fully set it to .8, and .79 didn't cut it.

    Forehead slap.
  • If it's a Energy Star rated stat, that's pretty much what they do.
  • Normal setting is .8
    Furnace should run about 6 times per hour. Increasing the number reduces the runs.
    Make and model of furnace?
    Make and model of thermostat? Is it set for gas operation?
  • btw, the anticipator settings are suppose to lengthen the time the funace cycles between on and off if you increase it, and shorten the time if you dial it down.