Question about Honeywell Programmable Thermostat Heater

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Installing a honeywell CM900 wireless programmable thermostat

We have a an old honeywell analogue thermostat installed with our central heating system. Do we install the CM900 receiver unit directly inplace of the old unit?

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  • Anonymous Mar 17, 2014

    Thermostat not wireless connecting

  • Anonymous Mar 18, 2014

    How do you program the cm900 for a certain period of time and then the boiler shuts off

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The analog unit uses just two wires for heat. red - white. there is a heat anticipator setting that must match the burner current. check your programmable specs and follow instructions.

Posted on Dec 07, 2007

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Posted on Jan 02, 2017

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1 Answer

Failure of my Honeywell CM61ng wireless thermostat. Replacement advice


Probably not. There are replacement models available.
The T6661B programmable room thermostat is also known as CM61.
CM61 1 day wireless programmable thermostat is replaced by CM921.
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Hi I have a Honeywell st699 programmer for central heating and hot water. The only problem that we have is that we can not change the time on the clock. This means that we cannot set any programmes. Is it...


HONEYWELL WEBSITE:
Go to honeywell.com
Under red welcome sign
Bottom red highlighted box literature/image search
Type in thermostat model number
Click on arrow to right
Then click on the PDF files owners manual / installation instructions
If you can’t find what you want, the bottom left and bottom of web
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Aug 17, 2010 | Honeywell Programmable Thermostat Heater

1 Answer

Programmable Thermostat Heater: no power to honeywell central heating control...


Multiple possibilities:
Damage to cable (doing any DIY?)
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Board gone in heat unit
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May 18, 2010 | Honeywell Programmable Thermostat Heater

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.

Helping Hands Services
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1 Answer

We need a wiring diagram for Central heating programmer Honeywell ST7100 installation


http://www.honeywelluk.com/product.aspx?r=pp&p=2470

hope this helps
if it does please vote , if that site dosent allow you in you might have to register with them , or alternatively post your email address and i'll send you the installation guide

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This does not sound like a thermostat problem. I would be looking for a zone valve or circulator pump problem.

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did u turn the power off to unit before installing t-stats,if not then mabe blown low voltage fuse

Mar 28, 2009 | Honeywell Programmable Thermostat Heater

1 Answer

Installing CM900 Honeywell into Junior 24 Bosch Combi


What kind of boiler are using is this boiler a on the demand electric or gas? You need low voltage wires. If you get me make and model # of off boiler i can try and find wiring diagram . Tell me a little more about you heat system to. Like baseboard heat or in floor how many zones

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2 Answers

I can't program my thermstat


go to www.honeywell.com. There you will find a search tab. Type in the exact model number of your thermostat. You will be able to download the installation/owners manual.

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