Bard HVAC 8403-089 Thermostat L99H008 Smith and Lochinvar hydronic systems

Smith and Lochinvar hydronic systems

Direct OEM Compatibility: Engineered to replace obsolete 47-21777-05 and 47-21777-10 units without field modification

this part number is the switch body only

Integrating this genuine ICP replacement part restores system integrity

Bard HVAC 8403-089 Thermostat L99H008 Smith and Lochinvar hydronic systemsThe Bard 8403 089 Thermostat is a field proven 1H 1C programmable thermostat built on the Honeywell T4 Pro Series platform. This unit serves as the direct replacement for Bard 8403 057 and Honeywell TH3110D1040, providing a seamless upgrade path for legacy single stage residential and light commercial HVAC systems. Designed for technical efficiency, it features a UWP mounting system and a tool less terminal block, significantly reducing installation