“are the Honeywell smart thermostats compatible with an ABCD wiring. The nest is not. Thanks,”

1-1 of 1 Answer

• Hi Epk! Unfortunately, ABCD wiring is proprietary communicating wiring. This type of wiring is not compatible with Honeywell thermostats. Please contact your local licensed HVAC professional for assistance in determining a compatible thermostat or if your system can be converted to a standard wiring protocol. Hope this helps!

  Answered by Honeywell Support 7 years ago

  Helpful (0)Unhelpful (0)

  Report

  Sorry, there was a problem. Please try again later.