Resideo TL8100A1008 Thermostat 321042-401 The unit features tri-class protection

The unit features tri-class protection (Class 5

leading to "ghost" faults

eliminating the risk of using incorrect aftermarket seals

this unit features an automatic reset and a 1" NPT threaded connection

this OEM part facilitates a seamless furnace pressure switch replacement for residential and light commercial equipment from Lennox

Resideo TL8100A1008 Thermostat 321042-401 The unit features tri-class protectionThe Resideo TL8100A1008 from the LineVoltPro 8000 series is a versatile 7 day programmable hydronic thermostat engineered for high performance control in residential and commercial heating. This specialized line voltage thermostat handles a wide operational range, including 120Vac, 240Vac, and 24Vdc, making it a reliable solution for technicians working on millivolt compatible systems such as gas fireplaces or wood boilers. Its single stage heat logic