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When servicing HVAC valves such as the VB-7xxx or discontinued VB-9xxx series
the balance and blade pitch are tuned specifically for Carrier
High-Temperature Limit Protection: Features a factory-installed thermal limit switch to prevent overheating
When you're out in the field and a Sterling unit heater or commercial furnace is cycling on the limit or failing to prove combustion
" the trap may fail closed
Lennox 24L22 Pressure Switch 326010-701 When servicing HVAC valves suchThe Lennox 24L22 pressure switch is a critical genuine OEM replacement part designed for precise air pressure monitoring within Lennox HVAC systems. Engineered to maintain strict operational parameters, this low pressure switch acts as a primary safety mechanism, detecting pressure fluctuations and signaling the system to adjust or terminate cycles to prevent component damage. This specific model, often identified by part number 24L2201, is built with