Welcome! Here are the website rules, as well as some tips for using this forum.
Need to contact us? Visit https://heatinghelp.com/contact-us/.
Click here to Find a Contractor in your area.

Any way a digital Honeywell can malfunction & change it's own setpoint?

The Honeywell RTH111 thermostat in a tenant's apartment keeps mysteriously changing it's setpoint: 2 days ago 55 deg, today 40. I just put a box around it, but they swear up & down neither they nor their kids touched it. I presume their small kids are no more trustworthy than most, but is it at all possible it's a malfunction, say if the pins weren't seated all the way in?


  • Paul48
    Paul48 Member Posts: 4,469
    I'd say yes

    Changes in power can cause problems with electronics. Blips, surges and power failures can cause programmable controllers to change their settings.
  • RobG
    RobG Member Posts: 1,850

    I don't know about the thermostat, but if you were my landlord and kept my heat at 55 degrees, I would move!
  • Jells
    Jells Member Posts: 576
    The setpoint is 70!

    Sorry if I was unclear. But in fact, I have tenants who apparently have never paid a heat bill in their lives, One woman stands there in a 70 deg room wearing short and a tank top complaining of the cold. When I mention she should put some clothes on, she says "that's ****!" The last owner reported spending $12k per yr heating this 3500 sq ft 4 unit.
This discussion has been closed.