Question about Honeywell CT3500 5-1-1 Day Electronic Programmable Thermostat Heater

Open Question

Replace a CT3500A4453 Honeywell Thermostat with a CT3100C.

Need to make sure of wire connections (controls a heatpump):
CT3500A (R-RC, O, W-Y, G)
CT3100C (E, Aux, Y, G, O, L, R, C)

Here is what I believe it should be:
R-RC to R, O to O, W-Y to Aux-Y, G to G

I don't know whether the E of the CT3100C should be connected to the Aux-Y.

Posted by on

  • efc2005 Jun 01, 2009

    The CT3100c should be RTH3100c

×

Ad

6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
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.
goodluck!

Posted on Jan 02, 2017

Ad
hotuna
  • 288 Answers

SOURCE: Honeywell 6300 programable thermostat instalation

The thermostat is a low voltage circuit (24 volts) most of the newer heating systems have a fuse for the low voltage controls. If you are having to re-set the high voltage circuit breaker, then you have something else wrong. When does the breaker trip? while its running or after it shuts off?

Posted on Jan 03, 2008

Ad
SASSYBEAR
  • 148 Answers

SOURCE: Wiring a Honeywell Deluxe Programmable Thermonstat

did you mark which terminals you removed the wires from on the old stat? If not you will need to look on the furnace and see what letters they are connected to .. then connect to the same on the thermostat.

Posted on Mar 08, 2008

machtcl1
  • 61 Answers

SOURCE: Thermostat Wiring: W2? E? Where to connect?

You have a heat pump. You need a thermostat for "Heat pump with Electric back-up heat". Make sure the 'stat has either an "aux" (auxilliary heat) or an "E"(Emergency heat) terminal. The wiring instructions will be provided with the thermostat.

Posted on Dec 16, 2008

  • 3 Answers

SOURCE: wiring diagram to connect programmable Thermo to Heat Pump

I don't know if this will be helpful or not, but I just installed a new Honeywell and the Honeywell customer service guy helped me get the wires done correctly. The number is 800-468-1502.

Posted on Jan 05, 2009

  • 232 Answers

SOURCE: Wiring

red goes to RC and RH, White goes to W, Green goes to G and Blue goes to Y. iam assuming on the old tstat that Red whent to R White went to W Green went to G and Blue went to Y

Posted on Sep 20, 2009

Testimonial: "Thanks! Worked out great!"

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

How do I wire a Honeywell thermostat


Can I start by saying I am not in anyway saying to do this alone it is dangerous but if u must follow each step start by being safe shut off the breakers good luck here to help
Step 1
Turn the air conditioning and heating unit off by flipping the appropriate circuit breaker. Test the unit to make sure it's off by turning your existing thermostat to the "On" position and seeing if it turns on. Wiring a Honeywell thermostat when the circuit breaker is on could cause you to blow the transformer that powers the HVAC unit Step 2

Connect the red wires to the thermostat RH, thermostat RC or thermostat R terminal. The thermostat RC terminal has a jumper wire between thermostat RH and thermostat RC. The thermostat R terminal operates both the heating and cooling units, and contains an internal jumper wire. Basically, your red wire on a Honeywell thermostat is the hot wire that run. Step 3

Run the green wire to the thermostat G terminal. The green wire controls the relay that operates the blower, and it controls the fan. Step 4

Control your air conditioning when you connect the yellow wire. It connects to the thermostat Y terminal Step 5

Hook the white wire to the thermostat W terminal to control the heating unit

Nov 20, 2014 | Heating & Cooling

1 Answer

How do I connect the two thermostat wires from a Honeywell R8184G4009 to a programable thermostat. My old thermostat is not marked.


On the Protectorelay Oil Burner Control R8184G4009, you connect the two thermostat wires @ "T" and the other "T". On the ACE Smart Temp Universal programable therostat, connect one wire to "Rh" and the other wire to " "W". Be careful if you are using this thermostat for A/C. In that case, make sure there is no jumper between "Rh" to "Rc".

Feb 02, 2013 | Honeywell Protectorelay Oil Burner Control...

1 Answer

Rth2310b wiring


More than likely, this is what you have:

Red- Power- (RC/RH)
White- Heat- (W)
Green- Fan- (G)
Blue- Cool- (Y)

Usually, the only times you need more than 4 wires are:

1. You have a HeatPump system.
2. Your new digital thermostat does not use batteries, which then you have to have a common wire to power the thermostat.

May 26, 2012 | Honeywell Rth2310b 5-2 Day Programmable...

1 Answer

I Have a honeywell RTH2410 Thermostat I wired it without the blue wire which used to go to X on my old thermostat. Now it comes on with aux heat all the time and I have a Heat Pump. How can I fix this?


What was the old thermostat labels and the wire colors that went to them?
The typical heatpump wiring Terminals are:
R = Red = Hot side of Transformer
C-B-X = Common side of transformer Depending on brand of heatpump
Y = Yellow = Cooling Contactor
G = Green = Furnace Blower
O = Orange Reversing Valve Energize to Cool
B = Blue Reversing Energise to Heat Depending on brand of heatpump.
W2 = White = Auxiliary Heat
You need to be sure where each wire comes from when you connect them to the new thermostat.
The best way to do that is to go to the furnace and see where they are connected. R-Y-G are probably correct, you need to see where the Blue wire comes from and determine what the X terminal was on the old thermostat.

Dec 29, 2009 | Honeywell Electronic Programmable...

1 Answer

I have a heatpump wired as in diagram fan works a/c works but not heat what do i do?honeywell CT87N


On the sub base jumper R to RC this will allow it to work in heat.Just Run a wire from r over to rc termminal and try it. If it does not work get back to me and I will help, Rus

Dec 05, 2009 | Honeywell CT87B ROUND HEATING&COOLING...

1 Answer

I want to replace programmable thermostat with old dial style


The terminals should be the same on both thermostats, except for C- common.
R- usually RED, goes to hot side of transformer,
W- usually WHITE, goes to heat
Y- usually YELLOW goes to outdoor unit
G- usually GREEN goes to furnace blower
Any of the other wires just cap them off you don't need them. If you have an Rh and Rc terminal instead of R and don't have them on the programmable then put a jumper from Rh ro Rc.
If you need more, then let me know what terminals you have on both t'stats and brand of furnace and AC, if you have a heatpump then there's more wires let me know.

Oct 13, 2009 | Honeywell CT87B ROUND HEATING&COOLING...

1 Answer

Replacing Old York TS to HoneyWell RTH230B


rh is hot for heating rc is hot for cooling looks to me like ya need a heat pump stat some thing to control the reversing valve.Tom

Jun 18, 2009 | Honeywell Electronic Programmable...

1 Answer

Upgrading Thermostat


Looks like your system is a heatpump system and that t-stat will not run a heatpump , you need a t-stat for 2heat and 1 cool systems

Jan 30, 2009 | Honeywell Programmable Thermostat Heater

3 Answers

Honeywell RTH3100C


You need to go into the installer setting to change it from heatpump to single stage gas heat.Go to www.honeywell.com if youve lost them.

Dec 13, 2008 | Honeywell Programmable Thermostat Heater

1 Answer

Replacing thermostat for central heat and air/ not humidifier


rh and rc should have a jumper between them.connect red to either.y=yellow g=green w=white and do not use the blue.your new stat will run on batteries.

May 26, 2008 | Honeywell Power Humidifier: Furnace...

Not finding what you are looking for?
Heating & Cooling Logo

Related Topics:

393 people viewed this question

Ask a Question

Usually answered in minutes!

Top Honeywell Heating & Cooling Experts

Bill Long

Level 3 Expert

587 Answers

paulcarew

Level 3 Expert

2519 Answers

Brandon Berry
Brandon Berry

Level 2 Expert

407 Answers

Are you a Honeywell Heating and Cooling Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...