Return to the Heating & Air Conditioning Forum | Post a Follow-Up

upgrade from communicator tstat to wifi

Posted by cara7 (My Page) on
Sat, Aug 30, 14 at 8:29

I have a carrier a/c unit and Lennox furnace w heat pump. It has a air handler that only has the tstat connected for communication. The wiring shows V+(red) and Vg(white) for inputs at handler and red and green at the original carrier tstat. I am trying to upgrade to a WiFi thermostat (iris) but need the full remaining w, y, b wires. I have tried to disconnect the tstat wires at handler side to "break" communications, thus keeping
the 5 wires connected at both ends. Still doesn't work.

Follow-Up Postings:

RE: upgrade from communicator tstat to wifi

What model Carrier air handler and thermostat do you currently have? Are they connected with 4 wires?

 o Post a Follow-Up

Please Note: Only registered members are able to post messages to this forum.

    If you are a member, please log in.

    If you aren't yet a member, join now!

Return to the Heating & Air Conditioning Forum

Information about Posting

  • You must be logged in to post a message. Once you are logged in, a posting window will appear at the bottom of the messages. If you are not a member, please register for an account.
  • Please review our Rules of Play before posting.
  • Posting is a two-step process. Once you have composed your message, you will be taken to the preview page. You will then have a chance to review your post, make changes and upload photos.
  • After posting your message, you may need to refresh the forum page in order to see it.
  • Before posting copyrighted material, please read about Copyright and Fair Use.
  • We have a strict no-advertising policy!
  • If you would like to practice posting or uploading photos, please visit our Test forum.
  • If you need assistance, please Contact Us and we will be happy to help.

Learn more about in-text links on this page here