upgrade from communicator tstat to wifi ..help

cara7August 30, 2014

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.

Thank you for reporting this comment. Undo
mike_home

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

    Bookmark   September 21, 2014 at 11:09AM
Sign Up to comment
More Discussions
Problems with HVAC in 1958 Cape Cod
I've been reading the blogs here and hope that the...
ginaff58
Neighbor Finally Upgrades to Heat Pump
My next door neighbor finally took my advice and upgraded...
newtalk2
Need help choosing an efficient HRV Air Exchanger
Hi, My house as a total area of 2300 square feet (1150*x)....
Jim_Lafleur
ERV Systems
Hello: Is it really safe to forego bathroom exhaust...
Dona Dinkler
2 Stage vs 1 Stage
I am trying to decide what HVAC replacement system...
cms9323
© 2015 Houzz Inc. Houzz® The new way to design your home™