Question about Heating & Cooling
You would need to have a the hot wire from the transformer which would be the red one and connected to R/Rh/Rc. You would also need a common wire from the transformer connected to the C terminal on the contactor. It is usually a blue or brown wire. You would need to look at the transformer in the airhandler to see what color the common is. The secondary wires on the transformer are usually yellow and blue so you will need to look where these connect to the thermostat wires to see which is the common. Also your existing thermostat wire may not have enough wires in it to do this. Let me know if you have any questions.
Posted on Jul 13, 2010
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
Tips for a great answer:
Jul 06, 2016 | Honeywell Rth8500d 7-day Touchscreen...
Oct 11, 2014 | Honeywell RTH6350 5-2 Programmable...
Sep 09, 2014 | Honeywell Electronic Programmable...
Jun 28, 2012 | Honeywell Heating & Cooling
May 28, 2012 | Honeywell Rth8500d 7-day Touchscreen...
Feb 24, 2011 | Honeywell Heating & Cooling
Jun 15, 2010 | Honeywell Programmable Thermostat Heater
Oct 17, 2009 | Honeywell Programmable Thermostat Heater
Aug 21, 2017 | Heating & Cooling
327 people viewed this question
Usually answered in minutes!