Lennox 55W64 Pressure Switch While it shares features with

While it shares features with other limit controls

such as poor terminal retention or EMI interference

reducing installation time and ensuring proper airflow around the sensing element for accurate temperature control calibration

you should source a dedicated compound gauge or a 30" Hg vacuum unit

Lennox 55W64 Pressure Switch While it shares features withThe Lennox 55W64 High Pressure Switch is an essential safety and operational component designed for high pressure monitoring in residential and commercial HVAC systems. This genuine OEM replacement part ensures your equipment operates within safe parameters, specifically engineered to actuate at 590 PSI and features an automatic reset at 418 PSI. As the direct replacement for discontinued models 30W18 and 30W1801, this switch maintains the integrity