The McDonnell & Miller 354141

3 red flashes typically indicate a pressure switch that failed to close

Adjustable water detection sensitivity

For 3-15 PSIG requirements

Specifically designed for Watts Series 3001 and compatible with several other models in the RK-3000 collection

Nordyne 664344R Check Valve 326070-701 The McDonnell & Miller 354141The Nordyne 664344R is a high performance R410A 3 Ton TXV Check Valve designed for precise refrigerant metering in residential and light commercial HVAC systems. This OEM Nordyne replacement part acts as a critical thermal expansion device, sensing evaporator temperature and pressure to regulate flow and maintain the ideal superheat. Engineered for 3 ton capacity units, the 664344R check valve ensures consistent cooling performance and prevents