Question about Honeywell Electronic Programmable Heat/Cool Thermostat - CT3300A100 Heater

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What wires go to what terminals on my honeywell peaksaver thermostat?

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The red wire goes to the terminal thats power, green wire goes to g terminal for fan, blue is common goes to the b terminal,yellow is cooling the y terminal,and white is heat the w terminal.

Posted on Feb 07, 2010

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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

I want to replace a trailer thermostat that has 3 wires to a honeywell 4 wire thermostat . The problem is that the old wire has 3 wire (1w, 2r & 3 orange) the new one calls for 4 wires but wh


If there are both an Rc and Rh terminal, there should be a jumper across the two if there is only ONE transformer supplying power to both the furnace and the a/c. Without the jumper, there is no power on the cooling side of the thermostat.

Also, the Honeywell thermostat may require a fourth wire for the C terminal. Some thermostats 'rob' control power for their operation off of the R terminal wire and others must have the physical connection to the C terminal, and yet others have batteries for the programming portion and when they go dead, there is no heat or cool operation.

Sep 09, 2014 | Honeywell Electronic Programmable...

1 Answer

Honeywell how to install


Did you try E too aux and x1 to c?

Jul 20, 2014 | Honeywell RTH6580WF Wi-Fi Thermostat

1 Answer

Hi, I have a baxi solo boiler WM60/4RS and a Landis & Gyr RWB252 timer but my Honeywell T6160 thermostat has nether been connected, can anybody shed light on the wiring connections please.


The color code for thermostat wiring is as follows.
The "R" terminal is power into the stat from the boiler control transformer. Normally 24 volts. The "Y" terminal is for cooling. Normally left blank for a boiler. The "W" terminal is for heat. This one used to start the heating cycle.The "G" terminal is for fan operation. Probably not used for a boiler. Check the boiler terminal board for these functions and write down the wire color on each one. Match the boiler colors to the right function on the stat. If you need more than this, let me know.

Jan 06, 2014 | Honeywell Programmable Thermostat Heater

1 Answer

I need to replace an old Thermostat that just has 3 wires coloured Red, Blue and Yellow. The Honeywell THR830TUK Thermostat I have bought shows 5 wires on the diagram. I'm not sure which wire goes into...


The honeywell THR830TUK thermostat does not require a neutral as shown in the instructions.Connect the LIVE to terminal "1" and your YELLOW SIGNAL wire to terminal "3".
Connect your EARTH (if you have one) to the EARTH connection on the top left hand corner of the thermostat and blank off your NEUTRAL wire with a block connector.These instructions were supplied to me by Honeywell Customer Support.Hope this helps.

Jan 08, 2011 | Heating & Cooling

1 Answer

I just bought a Honeywell 5.2 Day RTH2300B Programmable thermostat to replace my old mercury thermostat for my gas fireplace. When I took of old thermostat it only has two wires. A white wire and a black...


I just installed a Honeywell 5.2 Day RTH2310B Programmable thermostat and I had to deal with the same situation: 2 wires, one white one black. After reading the edvice in one of the blog, the solution that worked for me was: BLACK ON Rc terminal and WHITE on W terminal. My furnace is running fine now. Hope it helps.

Dec 06, 2010 | Honeywell Focus 6300B 5-2 Days...

1 Answer

I'm tryingt to install RTH2410 honeywell thermostat for a central air/gas heat system. I accidentally discarded the old thermostat, because I thought the honeywell would be easier to install, but nothing...


Call 1-800-468-1502 for wiring assistance.
You probably have the wrong wire on the R terminal. Make sure that the wire on the thermostat R is the same wire that is on the furnace R terminal.

Oct 17, 2010 | Honeywell Heating & Cooling

2 Answers

Replacing WHITE-RODGERS manual thermostat with 3 wires ( red, white, blue and installing Honeywell electronic thermostat RTH110B, how do I connect it? The heating is not central, baseboard heating.


I have only seen one Honeywell thermostat that would work with a 3-wire heating system.

I would replace it with a White-Rodgers 1F80-0471. They are about $100, but they are a good thermostat, and they work well with the 3-wire zone valves.

Most other thermostats have the "Y" terminal that you need, but do not control the zone valve correctly.

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Jan 30, 2010 | Honeywell Electronic Programmable...

1 Answer

Installed my thermostat and the heat keeps climbing where did i go wrong? it is a honeywell Honeywell RTH221B Basic Programmable Thermostat


Make sure red wire is on R terminal, white wire is on W terminal. Also look for a short in the thermostat wire.

Oct 17, 2009 | Honeywell Electronic Programmable...

1 Answer

Changing a room thermostat a potterton to honeywell t6360


I think I've done it - but don't take this as absolute truth.
For the Honeywell T6360B the original Potterton wiring should be rewired as follows:
Brown [Live] goes to terminal 1; Blue [neutral] goes to Terminal 2 and the yellow/green [which is not an earth but a switched live - i.e. gives live to the heating system when the thermostat clicks in] goes to terminal 3.
Obviously all done with the power isolated and when it was switched back on we had heating again :o)
It's been on over two hours now and all seems fine.

Jan 13, 2008 | Honeywell Programmable Thermostat Heater

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