Patterson-Kelley 86-8335-0170 Air Flow Switch 321894-706 40VA Power Rating: Sufficient capacity

40VA Power Rating: Sufficient capacity to handle the cumulative load of solenoids

By providing continuous thermal feedback to the defrost control board

the Copeland 023-0058-01 prevents common issues such as residual magnetism or coil burnout

this HVAC defrost control relay handles switching for both the outdoor fan motor and the compressor contactor circuit simultaneously

Patterson-Kelley 86-8335-0170 Air Flow Switch 321894-706 40VA Power Rating: Sufficient capacityThe Patterson Kelley 86 8335 0170 Air Flow Switch is a critical safety and operational component designed for high performance commercial boilers and water heaters. As an OEM airflow switch replacement, this unit utilizes a sensitive differential pressure diaphragm to detect proper combustion air or exhaust flow. It is engineered to interface directly with Patterson Kelley industrial air flow switch control systems, ensuring the burner only fires when