and differential air pressure setups

for pipes larger than 3 inches

it handles the intense thermal stress of localized pilot flames while maintaining consistent electrical resistance

If the pilot light is failing to prove or the flame signal is weak

Aaon P86520 Pressure Switch Els PW 17895 and differential air pressure setupsThe Aaon P86520 Pressure Switch is a critical safety component designed for high pressure monitoring in Aaon HVAC systems. Engineered specifically for R22 refrigerant circuits, this manual reset high pressure switch functions as a fail safe to prevent compressor damage during over pressure conditions. Calibrated to trigger at 450 PSI, the P86520 ensures the system shuts down before internal pressures exceed safe operating limits. This HVAC pressure