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

1 Answer

Replacing Round Honewell Mercury Thermostat

I wish to replace a round mercury Honeywell Thermostat (approx 19 years old) ... with a digital 7 day programmable Honeywell touch screen. I have oil baseboard heat with 3 seperate heating zones & each thermostat turns on/off my furnace circulating zone pumps only. I have 2 small wires coming out of the wall for each thermostat.

Above said ... What is the best Honeywell touch screen 7 day digitial thermostat I can use here ... I just want to plug in the 2 little wires & go ...

Thanks ... Kha

Posted by on

Ad

1 Answer

  • Level 1:

    An expert who has achieved level 1.

    Mayor:

    An expert whose answer got voted for 2 times.

    Problem Solver:

    An expert who has answered 5 questions.

  • Contributor
  • 5 Answers

Try to get one that is made for oil heat, the installation is easy only two wires, and the instructions make it easy.

Posted on Apr 26, 2009

Ad

1 Suggested Answer

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 there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this 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.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017

Ad

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

Tip

Programmable Honeywell


A Programmable Honeywell Thermostat is a great investment for you to make for your heating and cooling system. A Honeywell Thermostat will provide you with the best in comfort and dependability for many years.

Many people when they think of Honeywell Thermostats think of the old round T87 thermostat that has been one of the most common thermostats for years and years.

915d979.gif


Today they have those thermostats in designer colors and they are still made and used in many situations. But the manual thermostat is quickly becoming a thing of the past. With the rising costs of fuel the Programmable Honeywell Thermostat is becoming more and more popular. Programmable Thermostat Honeywell is even one of the most popular searches when it comes to thermostats.

fddbfa4.jpg

The VisionPro thermostat line has quickly become one of the leading digital programmable thermostats on the market to today. The ease of programming this thermostat and the touch screen interface has made it a very popular choice for many people. There is a variation of this thermostat for virtually any possibility that you can think of. The FocusPro line also is a very good choice at a bit less cost. There is a basic Pro line and also even a digital thermostat in the traditional round configuration. Both digital programmable and basic digital thermostats are available for line voltage control of electric heating.

fba228a.jpg

Along with the thermostats you now are able to add remote outdoor sensors as well as install you thermostat in a remote place and run a sensor to the space you are controlling. For many years these capabilities were standard for commercial thermostats, but now they are a very real possibility for home use also. With an outdoor sensor these thermostats now have the capability to turn off your heat pump and start you backup heat a certain preset out door temperature. In the past many systems have been installed with complicated electronic to do what a thermostat can do very easily.

The Programmable Honeywell Thermostat has come a long ways in the past few years. The changes have made this thermostat capable of doing many unbelievable things. If you are looking to replace your old thermostat, carefully compare the many thermostats on the market and then pick the one that will meet your needs the best. For many the Honeywell digital thermostat will be the best choice, giving them great flexibility and reliability in one thermostat.

http://www.fixya.com/support/r3894275-manual_honeywell_find_honeywell_manuals

http://www.fixya.com/support/r3623083-thermostat_wiring_terminal_designations

on Jan 15, 2010 | Heating & Cooling

1 Answer

I have a honeywell T87K round thermostat (2-wires R and W). I just purchased a honeywell WIF 7-day programmable thermostat RTH6580WF. How do I install the new thermostat? Is it even possible?


Programmable is in unit nothing to do wire fto urnace two wires cut furnace on and off you should have instructions to use two wires with your instructions

Aug 18, 2015 | Honeywell T87K1007 Mechanical Thermostat...

1 Answer

Can I use a household thermostat in an RV for heat and air?


As long as it is a 24 volt A/C system, which most are (look at the old thermostat in your RV) , and as long as it is a digital thermostat. Do NOT use one with mercury in it like the old round brown Honeywell that everybody has. The non-digital thermostats that use "snap-action" springs can be used, but they are mostly junk. Spend $35 on a decent digital and you will be fine.

Jun 05, 2015 | Heating & Cooling

1 Answer

Honeywell com yourhome


Yes, it should work. Old thermo has 4 wires, follow instruction with new thermo.

Jul 22, 2014 | Honeywell Universal Digital...

1 Answer

Round honeywell thermostat


Sounds like you have a T86 thermostat...take the round front cover off to view the Mercury switch. Watch the bulb when you change the temperature to a higher setpoint. If the bulb makes contact when rotating it up, and the furnace doesn't go into a call for heat, then it could be the thermostat, wiring, or furnace problem.

Dec 13, 2013 | Honeywell Heating & Cooling

1 Answer

Honeywell programmable thermostat - was installed per instructions in manual and now the furnace runs non-stop unless I move switch to "off." The old (round mercury switch) thermostat was wired red t


If you are unsure about which wire goes where, that may be the source of your problem. The color coding can be confusing when changing from old to new. I pulled the instructions for my Honeywell CT3400A thermostat and found you can call Honeywell Consumer Services at 1-800-468-1502 M-F 7:30 am to 5 pm CT

Mar 11, 2013 | 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...

2 Answers

My murcery thermostat is acting like a switch


Check to be sure the spring isn't binding in some way preventing it from moving freely. It is possible the mounting screws may be too tight deforming the plastic a little. Also be sure it is absolutely level. It is critical on the mercury type thermostats.

Jan 06, 2010 | Honeywell CT87B ROUND HEATING&COOLING...

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

1,277 people viewed this question

Ask a Question

Usually answered in minutes!

Top Honeywell Heating & Cooling Experts

Bill Long

Level 3 Expert

588 Answers

Paul Carew

Level 3 Expert

3284 Answers

vance jones

Level 2 Expert

120 Answers

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

Answer questions

Manuals & User Guides

Loading...