Nordyne 663864R Service Valve Never touch the black element

Never touch the black element with bare hands

Check the rating plate on the interior of the furnace cabinet

maintaining identical tolerances and thread specifications

This orifice is designed for a 3/16-inch tube connection

While a 3-wire kit uses a separate potential relay

Nordyne 663864R Service Valve Never touch the black elementThe Nordyne 663864R Service Valve is a technical grade 3 4" low side suction line valve engineered for critical field replacements in split system air conditioning and heat pump units. As a direct successor to legacy part numbers 663575, 663992, and 663992R, this component ensures full mechanical compatibility with older Nordyne, Intertherm, and Miller HVAC platforms. This HVAC service valve replacement features a robust brass construction designed to