Honeywell RTH230B 5-2 Day Programmable Thermostat Large - Answered Questions & Fixed issues

I followed a comment from a previous source and reversed the polarity of the batteries. I then flipped them back to the correct position and the flashing battery indicator went away and the thermostat functions correctly.

Honeywell... | Answered on Oct 03, 2019 | 6,813 views

Hello, the snowflake flashing is a (supposed to be) 5 minute delay to prevent short cycling of the compressor. This delay can sometimes get stuck thus requiring replacement. To test , remove top of thermostat to where you can identify wires and terminals. Have someone stand near the ac unit for this test, and then take a wire or paperclip and briefly touch Rc to Y. This should start the outdoor unit. R to G will start the indoor fan

Honeywell... | Answered on Jul 06, 2019 | 26 views

Contact Honeywell and see if there is some sort of reset for unit.

Honeywell... | Answered on Mar 03, 2016 | 84 views

nothing to do with filter follow thermostat set up parameters may have been locked

If you need further help, I’m available over the phone at

Honeywell... | Answered on Feb 03, 2015 | 118 views

your thermostat may be locked go to honeywell web site punch in thermostat model # and look for set up pushing two button at the same time gets you in but you will need instuctions for set up

If you need further help, I’m available over the phone at

Honeywell... | Answered on Feb 03, 2015 | 103 views

Try replacing or installing two AA batteries. or call 1-800-468-1502 for help, that number is from the manual you read.

Honeywell... | Answered on Nov 26, 2014 | 116 views

means it is running in the cooling mode a flame means heating

Honeywell... | Answered on Sep 16, 2014 | 1,066 views

You have to take the cover off and get inside and unhook a wire. You may have 3 wires unhook 1 and if that doesn't turn it off hook it back up and unhook the next. One of them will turn it off!! Then go to the hardware and get another thermos!! You won't get a shock or anything cause it's not hooked up to any power source, they are just sensor wires. I don't know much about Honeywell, I just know I don't like their thermos. Had one once and had nothing but trouble w/it !!

Honeywell... | Answered on Jul 27, 2014 | 43 views

Please go to the link and check graph "2.5 Installing the Batteries". Its really easy so it should be a piece of cake.

Honeywell... | Answered on Mar 31, 2014 | 379 views

It could be the breaker is tripped or the blower is not getting power. Check your transformer to make sure you are getting 24 volts going to the fan relay sequencer and make sure you check your capacitor that is connected to the fan as well. sounds like a minor electrical hiccup. Also check your thermostat wires and pay close attention to anything marked w1 or w2 as these are the terminals that control the heating part of your system.

Honeywell... | Answered on Dec 01, 2014 | 336 views

don't know but honeywell technical support may know
check if it has a safety switch in the base as it may not be making contact with the surface the fan is sitting on.
It has a timer maybe cause ?
if not in usa then go to honeywell in your country and then look for help at bottom of web site.

Honeywell... | Answered on Jun 01, 2020 | 45 views

Off position then reverse batteries polarities and wait 5 sec. Then place new batteries back to normal position.

Honeywell... | Answered on May 23, 2020 | 2,278 views

Honeywell... | Answered on May 03, 2020 | 54 views

Robert Shaw 9500 manual

Honeywell... | Answered on Apr 29, 2020 | 172 views

get in a repair person and send the bill to the land lord. He has no legal right to interfere in your operation of your equipment

Honeywell... | Answered on Mar 16, 2020 | 76 views

There is a battery inside the thermostat. No one seems to know about this battery. If the battery is dead thermostat won't work. Pop thermostat apart, test battery and replace.battery. I am not 100% sure this is your problem, for your thermostat, but I have come across this problem before. Good Luck Friend.

Honeywell... | Answered on Feb 24, 2020 | 104 views

To change to F to C follow the next steps:

1. Press and hold and the same time (simultaneously) the up arrow and fan button (middle button under the screen) until the display changes.
2. Press next until you see 14 on the left and 0 on the right.
3. When you see the 14 on the left and the 0 on the right, press up arrow to change number 0 for a 1.
4. Then press Done and you will see your normal display in Celcius.

Good luck!

Honeywell... | Answered on Jan 23, 2020 | 128 views

What type of system do you have?
If you have a heat pump with a reversing valve you will need to set the thermostat settings for a heat pump. Or it can also be the wiring. Check your setting on the thermostat.

Honeywell... | Answered on Jan 23, 2020 | 271 views

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