20 Most Recent Honeywell RTH230B 5-2 Day Programmable Thermostat Large Questions & Answers


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


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

Honeywell... | Answered on Mar 03, 2016


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 https://www.6ya.com/expert/mike_9693b5ad75773352

Honeywell... | Answered on Feb 03, 2015


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


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

Honeywell... | Answered on Sep 16, 2014


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


Please go to the link and check graph "2.5 Installing the Batteries". Its really easy so it should be a piece of cake.https://customer.honeywell.com/resources/techlit/TechLitDocuments/69-0000s/69-1800.pdf

Honeywell... | Answered on Mar 31, 2014


try this web site for your manual. I think this is what you are looking for.
https://customer.honeywell.com/resources/Techlit/TechLitDocuments/68-0000s/68-0280.pdf

Honeywell... | Answered on Jul 14, 2019


I have not seen this issue and the manual gives you the option of either off or dim to high upon key depress.
Manual:
0280 Backlight 0 Backlight on for approx. 8 seconds after keypress 1 Backlight always on low intensity, full bright after keypress (requires 24VAC connection).
I am sorry I can not offer any further info.

Honeywell... | Answered on Jul 14, 2019


Without seeing the wiring diagram, I can only say that the MV/PV terminal in many cases is used as the common from the thermostat/transformer. Usually, the 24 volts is supplied to the thermostat from a step down transformer and the thermostat sends voltage to the controller. I would hesitate to "guess" at this without a complete understanding of the wiring requirements. Any HVAC tech should be able to help you.

Honeywell... | Answered on Jul 14, 2019


It has been my experience that the screen is damaged. You will most likely have to replace the thermostat. I have seen where heavy scratches will cause this condition.

Honeywell... | Answered on Jul 14, 2019


So if the temp changes what are you wanting to change? I'm confused.

Honeywell... | Answered on Jul 10, 2019

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