White Rogers Programmable Thermostat Programmable Thermostat White Rogers 474045?

Programmable Thermostat White Rogers 474045? - white rogers programmable thermostat

I installed a programmable digital thermostat last winter.
Now I want to change / C
And he said that by flashing snowflake
The compressor is in lock mode
Needless to say, that the air does not light or fan.
The work of the heat and the fan works in heat.
No A / C