Look for "hissing" at the actuator housing or a damper that fails to reach its full stroke despite receiving full signal pressure

this sensor is the manufacturer-designated replacement for TST2306 and TST2306K

the 8402-067BX offers improved reliability for long-term cycling

Optimized Ignition Reliability: Reduces service calls by eliminating erratic pilot flames caused by clogged or degraded old-style orifices

Technicians should typically mix 3 fluid ounces of cleaner per one gallon of system water

Lennox 48M68 Bracket Look for "hissing" at theThe Lennox 48M68 Rollout Switch Bracket is a critical safety component designed for precise flame rollout switch positioning in Lennox gas furnaces. As an OEM Lennox replacement part, this bracket ensures the thermal limit switch remains securely mounted near the burner assembly to detect abnormal combustion conditions. The 48M68 is a direct replacement for the discontinued or alternate part number 48M6801, offering seamless HVAC part compatibility