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My chronotherm thermostat pannel wont work , although the pannel displays time and temperature I cannot alter any settings or program it - the touch buttons do not seem to accept anything. It is a honeywell cm51. I have replaced the batteries.

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  • adam_m_p_smi Oct 20, 2008

    I have exactly the same problem. Let me know if you find a fix!

  • losiakowa May 17, 2009

    I have this same problem. My thermostat, doesn't working. When i'm pressin the buttons it's ok, but later its again gone bad. Who can help me? 

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1 Answer

Push on the little reset button on the back (print) side

Posted on Nov 04, 2008

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Honeywell th8110u1003


The Honeywell TH8110U1003 thermostat is a universal programmable thermostat that gives you electronic control of 24V AC heating and cooling systems. It also has the capability to be used on 750mV heating systems


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One of the best features of this thermostat is it’s big clear backlit display. The current temperature, the set temperature and the date/time of day are displayed at all times. Simply touching the screen also activates the back light feature.

This digital thermostat has a menu programming guide the helps you through the process of setting up your schedule. You are able to select multiple days and customize the thermostat for any kind of unique schedule you may have. This thermostat also let’s you take it off the wall and still be able to program it. This lets you watch TV and program it at the same time.

There are built in backups that will hold the time for you if the power goes out. This t-stat will also update for daylight savings time. There are HOLD features that allow you to modify your program and hold it and then go back to the original.

Change reminders that are built in include the air filter, UV light, humidifier service and of course the batteries of the thermostat. The blower of you furnace can also be programmed to run extra to help increase the air quality in your home.

If you decide you want to know the outdoor temperature you can purchase an additional sensor and then hook it to you thermostat. The outdoor temperature will then be displayed on you thermostat. This feature also gives you the capability of using the sensor to monitor indoor temperatures remotely.

This thermostat will keep you very comfortable as the variation typically in temperature from set point is less than 1 degree F. The thermostat after a period of time learns the characterizes of the way the house or building heats and cools and then adjusts to get the most efficient operation of the heating or cooling system while maintaining a very close temperature tolerance.

By changing a few of the parameters in the thermostat this can be can be configured for either single stage conventional heat/cool systems or any single stage heat pump system.

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

http://www.fixya.com/support/r3869033-replacing_thermostat

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

http://www.fixya.com/support/r3892721-programmable_honeywell

on Jan 17, 2010 | Air Conditioners

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Air Conditioning Programmable Thermostats - Great for Heating and Cooling


Programmable thermostats contribute to overall system performance, maximizing energy savings while providing complete comfort control. They also allow flexibility to homeowners because they can be programmed to match their lifestyle. Programmable thermostats save energy by turning down the cooling and heating system at night or at times when your home is typically unoccupied.


Did you know that properly using a programmable thermostat in your home is one of the easiest ways you can save energy, money. Homeowners can save about $180 a year by properly setting their programmable thermostats and maintaining those settings. They can achieve significant energy and money savings that are possible through the proper use of your programmable thermostat. Programmable thermostats do two things:
(1) Compare the thermometer reading of a room's temperature to the "ideal" thermostat temperature you select.

(2) Give start-and-stop commands to the heating or cooling system in order to achieve an indoor temperature that is as close to your "ideal" thermostat setting as possible.


Your savings will largely depend on the length of your energy saving program periods and the temperatures set. For example, an energy saving period of 10 hours with the temperature set back 10° will save more than a 5 hour energy saving period with the temperature set back 5°. By maintaining the highest or lowest required temperatures for four or five hours a day instead of 24 hours, a programmable thermostat can pay for itself in energy saved within four years.

A programmable thermostat will keep you and your home comfortable while you are there to enjoy it, and will change the set point at programmed times to an energy savings level when you are not home. The precise temperature control of a programmable, energy-saving thermostat saves wear and tear on high-efficiency heating and cooling equipment by properly cycling the equipment. A programmable thermostat will keep you and your home comfortable while you are there to enjoy it, and will change the set point at programmed times to an energy savings level when you are not home.


Controlling your heating more effectively could save you up to 17% on your heating costs. In fact, during the winter you can save about 3 percent of your heating costs for every degree you lower your thermostat. Begin lowering your heating bill immediately with the pre-programmed 7-day schedule, or modify the programming to suit your lifestyle. By delivering the heating or cooling when you need it, and optimizing temperature for activity, sleep and times you are away you can maximize your comfort level and save energy.

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http://www.fixya.com/support/r3916016-honeywell_th8320u_thermostat

http://www.fixya.com/support/r3913560-honeywell_th8110u1003

http://www.fixya.com/support/r3902153-honeywell_rth7500d_thermostat

http://www.fixya.com/support/r3898732-lux_thermostat_500

http://www.fixya.com/support/r3869033-replacing_thermostat

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

http://www.fixya.com/support/r3623166-heating_air_conditioning_scams

http://www.fixya.com/support/r3584298-air_conditioning_programmable_thermostat




on Dec 06, 2009 | Air Conditioners

1 Answer

I have a rehau ct room thermostat but don't know how it works - the time needs altering. In another room I have a rehau ta and I think the two work together to control the underfloor heating. Can you tell...


Please click on the below link to download the REHAU Technical Manual.

http://www.rehau.co.uk/files/8179_REHAU_BA_Controller_864602_UK.pdf


To set the WLCT (Time and Temperature control) for the system please refer to page number 45 (Section 10: CT Set up Guide).

Jan 21, 2011 | Air Conditioners

1 Answer

Housesitting. RTH111B model. I cannot keep the


That is a NONprogramable T-stat. There is no program to overide, therefore there is no need for a "hold" option. To set the temp, place the switch on the side marked

COOL
OFF
HEAT

to the desired setting, and push the up down arrows on the front until the display shows 80.

The DISPLAY will revert back to the current room temperature within a few seconds, and will keep the unit on until it reaches the desired temp.

The set temperature remains at 80, it just shows the current room temp.

Aug 31, 2009 | Air Conditioners

2 Answers

How do i set a hunter theromtate #441100. i don't


Set the temp you desire and hit "Hold temp" or "program overide"

Hunter thermostats are notorius for problems.
Whenever I have a customer that is unfortunate enough to be stuck with one I always reccomend they replace it with a "Honeywell" or "White Rodgers" brand T-sat.

What kind of problems you might wonder?
Every kind imaginable.

If yours is not holding the set temp when you tell it to, it's probably not you, 99% chance the thing is simply malfunctioning.

Aug 29, 2009 | Air Conditioners

1 Answer

AC, Fan-Auto, Fan-On... nothing works. the request from the Thermostat doesn't engage anything. Thermostat Dispay works. How do I know if it is getting the 24volts from the relay? I presume the display...


Open the air handler. Locate the low voltage transformer. One side is 220 volts input. The other is 24 volts output. Take your VOM and touch the test leads to the input to verify 220v in. Then touch the other 2 leads to verify 24v out.
If you have power in and no power out, replace the lv transformer.

Jul 08, 2009 | Honeywell Air Conditioners

1 Answer

How to program Honeywell thermostat for remote sensor


Remote Sensor (Setup Function 0340): If an optional outdoor sensor is installed, the thermostat can display the outside temperature. If an optional remote indoor sensor is installed, the thermostat will display the temperature at the sensor location (the internal sensor in the thermostat is not used).
\ 0 No remote sensor
1 Outdoor sensor (display only)
2 Outdoor control sensor (select heat pumps

Dec 31, 2008 | Honeywell Air Conditioners

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