the switch's internal bi-metal disc has failed and requires immediate replacement

Engineered for gas furnace ventilation

If the foam shows signs of thinning

How do I wire the Belimo TFB24-3-S for floating control

ensuring the coil is fully utilized

Velocity Boiler Works (Crown) 961122 Rollout Switch R-134A the switch's internal bi-metal discThe Velocity Boiler Works (Crown) 961122 Rollout Switch is a critical safety component designed for precise high temperature monitoring in gas fired boiler systems. This OEM replacement part is engineered to interrupt the burner circuit if flame rollout or excessive heat is detected near the burner vestibule, tripped at a fixed setpoint of 240C (464F). As a primary boiler safety limit switch, the 961122 ensures system integrity by mitigating risks