Ritetemp Thermostat Help I Have A Rite Temp Termostat That Quit Working?

I have a Rite temp termostat that quit working? - ritetemp thermostat help

I installed a thermostat RiteTemp last summer, has worked well until today (model 6022). I have the function of maintaining the property instead of the program, but now when I put the air temperature is off.
I checked the breakers and restore the panel Circut and again ..... Happiness Can anyone help me please ...

Don