I have just moved into a new house and I have a NOMA Programmable Thermostat and no instructions on how to use it. It is locked and I cannot change the settings. I need help with instructions on how to unlock it and how to program it.

Hello _ I just bought the NOMA model 52-2558-8 programmable thermostat so I have the booklet. I could email you a scanned copy of the book.:)