RTH230B Thermostat I've been told that after I installed the thermostat that it did something to the transformer. Where is that located and how to fix it?

Do you mean the Honeywell RTH230B programmable thermostat? Most of the Honeywell thermostat manuals are available here: http://yourhome.honeywell.com/en/faqs/thermostat . Scroll through the pages to find the RTH230B or use the search feature. The search engine found the installation and user guide in three different languages, see https://yourhome.honeywell.com/en/supportsearch#q=Rth230b . The direct link to the manual in English is https://customer.honeywell.com/resources/techlit/TechLitDocuments/69-0000s/69-1800.pdf .

I hope this helps.

Cindy Wells

Electrical problem getting to hot ie burning out stat check transforme rvolts ?

I printed out the instructions for your thermostat. It looks like you should have the following.

There should be jumper wire between Rh & Rc

Red wire to Rh or Rc whichever is easier since there is a jumper. This is the hot wire and all the thermostat does is connect to route it to the components needed for heating or cooling.

Blue wire, tape it up and don't use it. There is no spot on this thermostat for it. It is only used on thermostats that are powered by the transformer.

White wire to W. Powers the heat relay

Yellow wire to Y. Powers the cooling contactor

Green wire to G. Powers the indoor fan relay

There is a black jumper on the back of the face plate. Look at section 2.4 Setting J2 Jumper in the installation instructions. Make sure you have it in the right position for what you have. If you don't have them just google them.

Hope this helps.

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.

Click on the link below to download or view the manual for your Thermostat.

http://www.manualnguide.com/download/manual-guide/honeywell-rth230b-thermostat-operating-manual.html

Good luck! :-)

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.

Sounds like a relay sticking. Possibly in the thermostat or possibly the furnace relay at the furnace. The next time it happens, unplug the thermostat from the wall. If the furnace still runs then it's the furnace relay.

Hope that helps...

Geno

Normally, you should have 5 color wires: W-White, Y-Yellow, G-Green, R-Red and C-Blue.

The Blue wire is a common from the transformer on older systems, which is probably hooked to RC terminal.

Try this: Remove the blue wire and jump the RC to RH with the red wire and you will be fine. Blue wire should not be needed with the new thermostat.

This should also be stated in the instruction manual.
Hope this helps.

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.