Seems that the Honeywell RTH230B thermostat is very popular with the Do It Yourself crowd, judging by the many questions about how to connect this thermostat.

Honeywell, while making a very good product, seems to not want to post the wiring diagram at their web site, and does not even recognize their own part number.

I have emailed Honeywell several times on this, with no luck.

To help others troubleshoot and advice how to connect this thermostat, I really need to see the wiring schematic.

If anyone has had any luck finding this diagram at the Honweywell site, please post back with the link to it.

Or can someone scan the diagram usually found in instruction booklet and post it here. I can ask admin to post a "Sticky" post that I am sure will very helpful for many, including myself. Then I will be able to help others with the connection problems.

Thank you in advance!

I have the instructions in Adobe PDF file if you post your email I will send to you.

That will be great, I appreciate it. Where did you find the diagram? In the box with the stat, or at Honey well website?

I bought another thermostat and copied the instructions and scanned them into a PDF file, then returned the thermostat.
I tried attaching the file but it is to big for this sites restrictions. Shoot me your email if you don't mind and I'll send them to you.

Also, I just posted a question about this thermostat (AC and Fan won't work). If you have any suggestions, that would be great. Thanks.

Would you mind shooting me a copy of the wiring diagram?

Thanks ever so much,
[email protected]

Done.