This two-position spring return actuator is engineered for high-performance fluid control in hydronic heating and cooling systems

ensuring a clean system remains the technician's responsibility during the vacuum and charging process

Rugged Construction: Designed with industrial-grade thermistor technology to withstand consistent thermal shock and chemical exposure within the heat exchanger

directly improving HVAC system efficiency and reducing jacket heat loss

A step-opening gas valve provides an initial lower gas pressure to ensure a quiet and reliable pilot ignition before ramping up to the full manifold pressure

Heatcraft Refrigeration 30101801 Thermostat 320735-701 This two-position spring return actuatorThe Heatcraft Refrigeration 30101801 Thermostat, also identified as a defrost termination switch, is a critical OEM replacement part for commercial walk in coolers and freezers. Engineered to provide accurate temperature control, this component acts as a high limit safety, automatically disconnecting power to heating elements if internal temperatures exceed safety thresholds. This ensures the protection of the evaporator coil and prevents thermal