I have a Honeywell programable RTH230B. I changed

The Honeywell RTH230B indicates that the system is running the overnight (sleep) program with the 4 inside the house symbol. When the house flashes, the desired temperature has been changed from that programmed temperature (bypass mode). The bypass mode should only run for 2 hours.

The default programming starts the sleep period at 10 P.M. and ends at 6 A.M. On the original program in the thermostat, the temperature target was set to 62 during the heating season and 82 for the air conditioning season.

Since the thermostat was set to bypass, you should check who in your house pressed the Up/Down buttons on the thermostat to change the house temperature. Beyond that, check the start and end times and the programmed temperatures for each scheduled period. Honeywell has the manual for the RTH230B here: https://customer.honeywell.com/resources/techlit/TechLitDocuments/69-0000s/69-1800.pdf .

I hope this helps

Cindy Wells
(On my own programmable thermostat, we recently found that one period in the week had been left at the default setting. Thus the thermostat was programmed to maintain 60 degrees when we wanted 65 during the day.)

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

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.

you will have to reprogram it according to the operating manual.
The manual is available on www.manualnguide.com

After you set the hr, min, and day, press the mode button.

This my situation exactly.  Changing from a 6 wire manual round Honeywell thermostat to a 5 wire Honeywell programable.  Is there a way to maintain all functions?

THIS TYPE has been deemed defective! changeout to a different type.

I have my temp on C and I need to change back to F I have the RTH230B programable

There are so many products, we cannot help without the model no. Try typing 'Honeywell programmable electronic thermostat' into google and searching for an image of your thermostat, then get the model no. Then you might be able to get some help.

go to www.honeywell.com. There you will find a search tab. Type in the exact model number of your thermostat. You will be able to download the installation/owners manual.