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.

Furnace will not listen to thermostat

Options
I have a tempstar 2 stage furnace. I just installed a new programmable thermostat. The furnace will not kick on when the temperature drops below the program temperature. It will work when I turn the curcuit breaker off and then on. Why won't the furnace listen to the programmable thermostat?

Welcome

It looks like you're new here. Sign in or register to get started.

Comments

  • JUGHNE
    JUGHNE Member Posts: 11,447
    How many wires were connected to your old T-stat?
    Did you buy a 2 stage T-stat for replacement?
  • mikeg2015
    mikeg2015 Member Posts: 1,194
    Need a lot more info.

    You can't rely on wire colors. Need to match up the terminals/functions of each thermostat.

    Might need a jumper added for the "R" terminal between Rc and Rh. Usually it's preinstalled.
  • birdy14k
    birdy14k Member Posts: 3
    There are only 4 wires coming out of my wall to hook up to my thermostat.
  • birdy14k
    birdy14k Member Posts: 3
    There is a jumper wire preinstalled between Rd and Rh
  • DZoro
    DZoro Member Posts: 1,048
    do you have a air conditioner?
    You mentioned it will only work when you cycled the furnace. Your furnace maybe in a fault situation.
  • unclejohn
    unclejohn Member Posts: 1,833
    I was thinking the same as Dennis that the furnace was in lock out. Most likely there is a flashing lite that will tell you the issue. Or you probably got a female thermostat. A female tstat will not listen to you, take it back and ask for a male tstat, a male tstat will listen but won't do what it's told. But it will drink beer with you.
    Solid_Fuel_ManDZoroGrallertmattmia2

Welcome

It looks like you're new here. Sign in or register to get started.

Welcome

It looks like you're new here. Sign in or register to get started.