Question about Honeywell Programmable Thermostat Heater

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How do I set my RTH2300/RTH221 Honeywell thermostat to regular use,overriding the programmed settings?

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Posted on Jan 02, 2017

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SOURCE: HONEYWELL THEMOSTAT RTH2300/RTH221 SERIES Display shows each number obscuring another number. lmpossible to program with all those numbers.

Remove the face plate and be sure where the conductors enter one another are straight and in good condition. Also be sure it's going on easily, meaning wires are clear and screws are all the way in etc. Hopefully an easy fix but may need to replace. Good Luck!!

Posted on May 12, 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

1 Answer

Blower runs continously....

Hi Kathi,

I think its thermostat or ,thermo sensor is out of order and if it is controlled by electronic circuit it can be faulty.
another thing sometimes output contact relay for motor is faulty it want turn off itself when the circuit energize the coil.

please call electrician who can handle.


Jan 10, 2014 | Honeywell Programmable Thermostat Heater

1 Answer

Need to know if it will work

Think you need a different will need one for line voltage, not low voltage.

Dec 08, 2013 | Honeywell Programmable Thermostat Heater

1 Answer

Installed the Honeywell RTH2300/RTH221 but the old thermostat was removed by someone else. Since the original wires were not labeled, I simply attached them to the new thermostat by following the letters...

This appears to be a thermostat installation that was made without regard to wire code. The Honeywell material I have suggests it may be necessary to check connections at the furnace end and work back to the thermostat. There may be compatibility problems between the number of wires in the old installation and terminal connections in the new thermostat. Honeywell may be able to help at 1-800-468-1502.

Oct 29, 2013 | Heating & Cooling

1 Answer

How do I set the temporary or permanent override feature on the Honeywell RTH2310B model thermostat?

To set the temporary override, press arrows up or down to desired temp. This will keep temperature
at temporary setting for 2 hours then return to programming. To permanent override press MODE button until schedule period number disappears (number inside little house on stat). Then adjust temp with arrows. Press the MODE button again to cancel override and return to programmable.

Jan 25, 2011 | Honeywell Programmable Thermostat Heater

1 Answer

Installed the Honeywell RTH2300

at the thermostat you have a small tolerance (most have 5% + or -) few degrees is not a problem ex...70F= 21C and 82F=27C this diference is inertial, you can set a lower temperature(ex...60 F to reach 72 F) the problem is if the temperature grow and never stop until the saftey thermostat stop the heating.also is posible to have a broken thermostat(work thermostat) and in this case it must be changed whit new one or the teperature probe is plced in a wrong place.

Feb 14, 2010 | Heating & Cooling

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