Common Technician Questions What causes a Lennox 46K72 limit switch to trip repeatedly

turn the adjustment screw clockwise to increase the pressure setting or counter-clockwise to decrease it

it allows technicians to fine-tune system balance on-site

It keeps the compressor crankcase warmer than the coldest part of the system

Velocity Boiler Works (Crown) 96-022 Rollout Switch R-407A Common Technician Questions What causesEnsure terminal safety and system integrity with the Velocity Boiler Works (Crown) 96 022 Rollout Switch. As a critical manual reset thermal safety device, this 144C 291F rated component is engineered to detect abnormal heat concentrations within the burner compartment. In the event of a flame rolloutoften caused by cracked heat exchangers, blocked flue vents, or restricted combustion airthis switch interrupts the ignition circuit to prevent hazardous