Always verify your specific model number and serial number against the HVAC parts diagram to confirm compatibility

while the pivot design between the disc and spring compensates for side thrust

This non-relay type thermostat operates with a direct acting control signal

you know that keeping oil out of water-sensitive areas or sensitive pneumatic actuators is critical to reducing service calls and HVAC maintenance costs

Technicians typically look for a pilot that will not stay lit

Resideo TH1110D2009 Thermostat 322838-754 Always verify your specific modelUpgrade your single stage control with the Resideo TH1110D2009 T1 Pro Non Programmable Thermostat, the professional grade replacement for legacy Honeywell TH3110D1008 and 8403 057 models. Engineered specifically for 1 Heat 1 Cool conventional systems and single stage heat pumps without auxiliary heat, this unit features the standardized UWP mounting system. This allows for rapid equipment change outs and future proofs the installation, as the mounting