providing a reliable normally-closed contact configuration

ensuring functionality regardless of power status

Use the adjustment screws on each element

Precision Safety: Integral ball check design effectively limits gas leakage during diaphragm failure

If the 12F1901 furnace sensor fails to detect a flame

Lennox 42W59 Reversing Valve Freon providing a reliable normally-closed contactThe Lennox 42W59 Reversing Valve is a genuine OEM 4 way brass heat pump valve specifically engineered to transition refrigerant flow between heating and cooling cycles. Designed for high pressure R 410A systems, this SHF Series reversing valve features 1 2" x 7 8" ODF (Outside Diameter Female) sweat connections, ensuring a leak resistant seal during brazing. Utilizing a 24V AC solenoid pilot, the 42W59 provides the rapid response required for