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periodic cleaning of the flame sensor is recommended to ensure continuous electrical conductivity
this LLD163 model provides superior moisture and acid removal to maintain system chemistry and prevent compressor failure
This is the specific pressure threshold at which the switch activates
a pre-installed thermocouple
York S1-025-21710-701 Pressure Control 30067439-890 periodic cleaning of the flameThe York S1 025 21710 701 Pressure Control is a critical OEM safety component designed for precise HVAC refrigerant pressure monitoring in commercial and residential systems. Engineered to operate on a 24V circuit, this control features a dedicated . 20" WC (Water Column) set point, ensuring optimized system performance and protecting against low pressure conditions that can lead to compressor failure or inefficient cooling cycles. As a genuine Source
