Backward Compatibility: Fully compatible with older Danfoss MG and G series rotary valves

eliminating the need for manual recalibration

this is the current manufacturer-approved update

Quiet Operation: Designed to dampen harmonic resonance

it provides superior resistance to corrosion and physical deformation under high static pressure transitions

Trane SWT3820 Pressure Switch 318423-701 Backward Compatibility: Fully compatible withThe Trane SWT3820 Pressure Switch is an essential safety component designed for precise monitoring of combustion blower pressures in Trane and American Standard furnace systems. This OEM furnace pressure switch operates with tight tolerances, featuring a factory set 1. 75" WC Open and 1. 94" WC Close rating. Engineered to detect proper venting and prevent operation under restricted airflow conditions, the SWT3820 ensures the induced draft motor is