My Totaline P474-0100 Digital Thermostat is not working it is flashing Fd message,:(

What is your question? Where to buy a new one? What FD means? How to reset it?

I don't know that's the message that appears on the screen. I tried pudhing all the buttons at the same time and it will not return to normal. Do you know how to reset it or help with the problem.

Here is their website if you don't get answers

Totaline