an audible humming from the compressor without startup

provided the valve’s maximum operating pressure differential (MOPD) is not exceeded

the DML (023Z5043) uses a 100% molecular sieve core for maximum moisture removal

including those requiring common wire (C-terminal) integration for continuous power

"phantom" signals at the control board

IO Hvac Controls UT32 Thermostat 320735-701 an audible humming from theThe iO HVAC Controls UT32 Titan is a heavy duty, universal touchscreen thermostat designed for high performance residential and light commercial HVAC system applications. As a veteran preferred 3H 2C heat pump thermostat, the UT32 offers exceptional versatility, supporting up to three heating and two cooling stages for dual fuel, gas, electric, and heat pump configurations. Its robust design allows for either 24VAC hardwired or battery powered