Question about Honeywell Programmable Thermostat Heater

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The digits in my thermometer disappeared. - Honeywell Programmable Thermostat Heater

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  • pchilivis Jan 16, 2009

    any other solutions--we are sooo cold!!!

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Hi , some thermostats use batterys . some use the power from the furnance . make sure the power is on and look for a door on the thermostat to open for the batterys

Posted on Jan 15, 2009

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Posted on Jan 02, 2017

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How to wire a honeywell rth2300/rth221 to a five wire connection


I am not familiar with this particular thermostat; however, here's some general information; I hope this solution will help you troubleshoot.
Multiple Thermostats set in 1 zone will conflict; the one with the lowest setting will be the determining Thermostat. Here's an option you can try yourself; my solution is 'hard reset' the thermostat - afterwards, i'm outta options. invest in external thermometer battery/natural types; & manually turn t-stat ON or OFF; Additionally, keep an eye on how much draw your AC is doing on your meter.

setOFF manual; however do NOT change settings or power-off t-stat. I'd keep it on what you had intended it from day1. However, some may debate to turn everything off beforehand. personally, myself, poweringOFF the switch connected to your t-stat works. Remove battery and reinsert inverted; wait (5sec-1min); remove; wait 1min ('debatable' timeframe 5sec - 1min); reinsert batteries correctly; if you have a programmable thermostat; do the same with the hit 'reset filter' held down & wait 5-sec1min; observe roomTemp reading. May I suggest to keep an extra thermometer around to determine if temperature reading from the thermostat correct? Friendly reminder to turnOFF 'auto' mode during this hard reset. If reset requires reprogramming your t-stat, do whatever required to set your desired setting. cheers. best of luck.

May 11, 2014 | Honeywell Programmable Thermostat Heater

3 Answers

How do I turn down my thermostat?.


I think you may be misinterpreting what it's telling you. The up down buttons select the DESIRED temperature, when it goes back to the same number it's showing you the actual temperature, which given time should eventually reach the desired temperature.

May 09, 2014 | Ouellet Heating & Cooling

1 Answer

Trouble shooting codes


Code Error 53 is "defective outdoor sensor" error.
source: search engine keywords - Code Error 53

I am not familiar with this particular thermostat; however, here's some general t-stat information; I hope this solution will help you troubleshoot.

Multiple Thermostats set in 1 zone will conflict; the one with the lowest setting will be the determining Thermostat for the group. Here's an option you can try yourself; my solution is 'hard reset' the thermostat - afterwards, i'm outta options. invest in external thermometer battery/natural types; & manually turn t-stat ON or OFF; Additionally, keep an eye on how much draw your AC is doing on your meter.

disable auto & enable manual; however do NOT change settings or power-off t-stat. I'd keep it on what you had intended it from day1. However, some may debate to turn everything off beforehand. personally, myself, poweringOFF the switch connected to your t-stat works. Remove battery and reinsert inverted; wait (5sec-1min); remove; wait 1min ('debatable' timeframe 5sec - 1min); reinsert batteries correctly; if you have a programmable thermostat; do the same with the hit 'reset filter' held down & wait 5-sec1min; observe roomTemp reading. May I suggest to keep an extra thermometer around to determine if temperature reading from the thermostat correct? Friendly reminder to turnOFF 'auto' mode during this hard reset. If reset requires reprogramming your t-stat, do whatever required to set your desired setting. cheers. best of luck.

Apr 12, 2014 | Honeywell Programmable Thermostat Heater

1 Answer

Honeywell TH5110D1006 FocusPRO Non-Programmable Thermostat need a tip or trick to keep someone from changing thermostat maybe disable buttons


I am not familiar with this particular thermostat; however, here's some general t-stat information; I hope this solution will help you troubleshoot.

Multiple Thermostats set in 1 zone will conflict; the one with the lowest setting will be the determining Thermostat. Here's an option you can try yourself; my solution is 'hard reset' the thermostat - afterwards, i'm outta options. invest in external thermometer battery/natural types; & manually turn t-stat ON or OFF; Additionally, keep an eye on how much draw your AC is doing on your meter.

setOFF manual; however do NOT change settings or power-off t-stat. I'd keep it on what you had intended it from day1. However, some may debate to turn everything off beforehand. personally, myself, poweringOFF the switch connected to your t-stat works. Remove battery and reinsert inverted; wait (5sec-1min); remove; wait 1min ('debatable' timeframe 5sec - 1min); reinsert batteries correctly; if you have a programmable thermostat; do the same with the hit 'reset filter' held down & wait 5-sec1min; observe roomTemp reading. May I suggest to keep an extra thermometer around to determine if temperature reading from the thermostat correct? Friendly reminder to turnOFF 'auto' mode during this hard reset. If reset requires reprogramming your t-stat, do whatever required to set your desired setting. cheers. best of luck.

Apr 02, 2014 | Heating & Cooling

1 Answer

Humidity thermostat


I suspect the walls are warm and fooling the thermometers.

Aug 07, 2013 | Heating & Cooling

1 Answer

DT200 Problems


Possibles are:
1. Heating system not powerful enough to get temp to 21 C. How high does it get if you set it to 23 C?
2. Hysteresis in DT200 set too wide? Adjust it to 0.5 or 1 C and retry.
3. Calibration error (ie you're using an independant thermometer to read the actual temperature, whereas the DT200 "thinks" it has reached 21 C. Is there a symbol on the DT200 which corresponds to a 'call for heat'?

Feb 08, 2013 | Honeywell Heating & Cooling

1 Answer

Can not get cool air to blow #RTH2308


first check your filter, a dirty Air filter can cause you system too malfunction, after you have change the filter check with a thermometer in the return first record the temp and then find a supply vent and place thermometer in it and record the temp the difference should not be less than 13 degrees if so call a HVAC contractor you may have lost you refrigerant, or have a mechanical issue, i.e. compressor not working, condenser fan not working or dirty coils

Aug 30, 2010 | Honeywell Programmable Thermostat Heater

1 Answer

Will the thermostat shown above that comes with the baseboard heaters shut off when the room reaches that tempature level?


it should,but you should be sure by setting to desired temp and take a temp reading with a digital thermometer as close to the bulb as possible

Feb 05, 2010 | Fahrenheat Built-In Baseboard Thermostat...

1 Answer

Incorrect ambient temperature on Honeywell Model RTH221B


Check in your manual for the thermostat. By pushing a combination of buttons you can get into the advanced installer menu. From there you can make an adjustment to correct the temperature.

Nov 11, 2009 | Honeywell Programmable Thermostat Heater

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