Question about Heating & Cooling
I am replacing an T8411R with RTHL3550 and I have the following wires (old=new): G=G R=R O=O Y=Y E=aux/E W2=?? C=?? I do not know what terminals to attach W2 and C to.
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.
New users get 2 Free calls (no credit card required) and instant help on almost anything you can think of (from cars to computers, appliances, handyman, and even pets).
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
Hello,You forgot to wire the O terminal w1 witch is the reversing valve.It is important to check if old stat is using O or B in witch case B terminal=w1 leaving O unused.
Posted on Apr 21, 2010
First off, make sure that the wires you are connecting at the thermostat match the circuit board of the unit. It is good practice, but not always followed to do a "1 for 1". To answer your question, W2 is simply when there is 2-stages of heating. If your furnace does not have 2-stage heating, then leave it empty on the t-stat. "C" is common. Common is neutral, so it should have continuity to the ground or L2. If your old stat did not utilize this, I wouldn't worry about it, unless the new stat is a touchscreen and constantly lit stat. Just keep this in mind. W-warm (heat), Y-cooling, G-fan, R-hot (main 24v power from furnace to thermostat), C-common (not always required), AUX (auxillary, if there wasn't one used on your last furnace, I wouldn't worry about it.). X may have been a common, or a dead terminal.
Bottom line, if you open your furnace to see the circuit board and where the thermostat wire connects, and match above, you should be just fine. Make sure you turn power off prior to opening the furnace, and when landing the wires on the stat. You could inadvertently blow the 24v transformer.
Posted on May 09, 2010
Tips for a great answer:
Jul 09, 2017 | Heating & Cooling
Feb 24, 2016 | Honeywell Universal Digital...
Sep 04, 2014 | Heating & Cooling
Aug 30, 2014 | Honeywell RTH3100C - Digital Heat Pump...
Nov 03, 2013 | Heating & Cooling
May 08, 2010 | Heating & Cooling
Apr 21, 2010 | Honeywell Heating & Cooling
Dec 20, 2008 | Honeywell Programmable Thermostat Heater
Dec 15, 2008 | Honeywell Electronic Programmable...
Nov 10, 2008 | Amana PTH123B25AJ Heat Pump Air...
405 people viewed this question
Usually answered in minutes!