York S1-025-17620-009 Pressure Control When dealing with a unit

When dealing with a unit that has tripped on high-limit or failed to initiate heating

Technicians often source this 2940-3571 sequencer when troubleshooting elements that remain energized after the thermostat is satisfied or fail to engage during the heating cycle

If the actuator is sluggish or unresponsive to pressure changes

this switch prevents overheating by interrupting the 24V circuit to the gas valve when plenum temperatures exceed safety thresholds

Connecting it to a lower voltage will result in insufficient heat output

York S1-025-17620-009 Pressure Control When dealing with a unitRef. # Control; 398Op 310Cl s1 025 17620 009