Question about Heating & Cooling
I have looked at the manuals for both models but I would like to know exactly what wire from the new unit connects to which wires of the old.
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
SOURCE: wiring on thermostat tl7235a1003
OK, here's my guess at this...I hope someone more knowledgable will confirm or correct me.
A line voltage thermostat switches the power to the baseboard heater. In other words, it's just like a wall light switch except it activates and deactivates based on the temperature.
I think your old model CT62 was wired exactly like a light switch. The hot wire to the light is broken then run to the wall switch and then back to the light so there's no neutral wire at a light switch box. This worked fine for your CT62 because it did not need power, it only needed to switch it.
The new model TL7235A1003 requires electrical power because it's programmable so you need both a hot wire and neutral wire at it's installed location. In addition you also need 2 wires leading to the baseboard heater so the thermostat can supply it's power.
I believe L1-L2 are to be connected to the hot/neutral wires, and the Load wires go to the baseboard heater.
If I am correct you will not be able to use this thermostat without some re-wiring.
Posted on Nov 27, 2007
Hopefully there are markings on the old t-stat as to what terminal is what.
on the honeywell 8000 use the heat pump labeling and then the standard wiring would be
There should not be a bare wire, it probably just has the insulation stripped back way too far.
You should probably open the furnace and compare the terminal label in the furnace to the wire color. normally yellow and blue pass through the furnace and are wire nutted to wires going to the outdoor unit. In the furnace the white wire will connect to the w or w1 terminal. also, you will need to set the Honeywell stat to have the following parameters.
other parameters that I did not specify, you may read the manual and make your own decision but I recommend factory settings for the other parameters
Posted on Jun 18, 2008
SOURCE: Can't get new thermostat to work
When you have only 2 wires it is set up to run just a heater only. If this is a central heat/air unit, you would have 4, red for Hot, White for heat, green for fan, and yellow for cooling. sometimes they will have a blue wire that's not being used for a spare only.Some times you can use just the heat part of the stat if you connect the Red to r and if the subbas'e says Rc and Rh .If so, try connecting red to red and if it does say Rc and Rh that means red cooling and red heating.Run a jumper wire across the 2 reds along with the red from the wall. Connect white to w.Try programming the heat and see if it fires up. If not, you will have to replace stat with a 2 wire Heating only thermostat. Do not pull any wires up from the transformer as you will burn it out!! Just remember, 2 wires are for a heater only!4 are for heat and cool, and 8 are used for a heat pump.Sometimes the new stats have the red jumper wire in place and all you have to do is hook your red to either end of the jumper, and then white to W. If no RCand RH, get a heat only stat, or it will never work believe me, I know this.Good Luck and let me know if you need more help. Shastalaker7
Posted on Nov 07, 2009
Tips for a great answer:
on Jan 15, 2010 | Heating & Cooling
Feb 12, 2015 | Honeywell Pet Cleanair Air Purifier...
Nov 11, 2014 | Heating & Cooling
Feb 07, 2013 | Honeywell Rth110b Horizontal Digital...
Nov 04, 2010 | Honeywell Heating & Cooling
Sep 15, 2010 | Honeywell Heating & Cooling
Jun 25, 2010 | Honeywell 17352 Quiet Care Programmable...
Sep 27, 2009 | Heating & Cooling
Aug 21, 2017 | Heating & Cooling
67 people viewed this question
Usually answered in minutes!