Plugged in and started up wine unit airhandler. Outside is powered on already. Found thermostat outside of wine room is unable connect to wireless sensor. Sensor batteries are dead, replaced with batteries from truck stock, used 2 aaa batteries. Batteries should be replaced every year. Started up wine system, Performed maintenance in cooling. Checked air filter, thermostat, coils, electrical, capacitors, controls, safeties, airflow, temperature split, refrigerant pressures, motors and bearings,
