[dsmithn]

It can be hard especially if you don't have a replacement just lying around.

[klodolph]

I'm sure I'm missing something, but in the past when I've replaced thermostats it's pretty easy. Easy to find a replacement and easy to do the work. I know that everyone has different levels of skill here but this is less involved than, say, replacing an outlet.

[cm2187]

A replacement compatible with the heating that may have been installed 10 years ago by a company that went out of business and from a manufacturer that also went out of business.