Question about Honeywell Programmable Thermostat Heater

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I am trying to replace my honeywell T834C2499 with a programmable RTH221. I have hooked the wires as follows: G to G, W to W, Y to Y and R to Rh - leaving the jumper between Rh & rc. My problem is that there was a red wire on my old thermostat that was hooked to a teminal marked 1 on one end and then tied in with the Y wire on the other end. How do I connect that wire to the new thermostat? Thank you

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  • Honeywell Master
  • 587 Answers

HONEYWELL WEBSITE:
Go to honeywell.com
Under red welcome sign
Bottom red highlighted box literature/image search
Type in thermostat model number
Click on arrow to right
Then click on the PDF files owners manual / installation instructions
If you can’t find what you want, the bottom left and bottom of web
Page, they have homeowners assistance and Home products to get the help you need.

Posted on Jun 01, 2010

  • mcsalay641 May 10, 2011

    Did you get your answer? I have the same old thermostat with the same jumper wire. Any help would be appreciated.

  • Bill Long May 13, 2011

    In a gas fired furnace, the jumper wire from #1 to Y is for auto fan control in cooling for that thermostat and you don't use it on the new thermostat.

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