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    noremac's Avatar
    noremac Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Jun 10, 2010, 10:56 AM
    Wiring a furnace thermostat
    I have a new Rheem Classic 90plus furnace without A/C. It's controlled by a White Rodgers programmable thermostat(1F80-224). I want to change to a non programmable and recently tried to install a Hunter heat only thermostat. The existing W/R thermostat was wired; white wire to W, green to G, red to RH, and a jumper from RH to RC. The Hunter thermostat had 4 terminal but only three were marked; R, W and G. An HVAC person told me I only needed the three but it failed to work when wired that way. I reinstalled the W/R as originally wired and it worked fine. I'm thinking of buying a W/R F86 0244 non programmable. Should I wire it the same as the existing W/R including the jumper. W/R wiring instructions don't mention a jumper from Rh to Rc--why is there a jumper installed?

    Thanks

    Mike
    wmproop's Avatar
    wmproop Posts: 3,749, Reputation: 91
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    #2

    Jun 10, 2010, 12:44 PM
    The jumper is only needed when you have ac,, so no need to worry about it,, you will lbe smart to forget the Hunter tstat,, most all are junk or will be soon after you install it
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