Johnson Controls A19ABC-42 Utility Thermostat 30067439-890 ensuring the unit cuts power

ensuring the unit cuts power to the heating elements or compressor if temperatures exceed safe operational thresholds

This part is specifically used to power the electromagnetic stems of solenoid and reversing valves within HVAC and refrigeration systems

low-resistance connection when paired with SH4B-05C DIN rail sockets

This specific model is the lead-free updated replacement for the discontinued 0066109

Visible moisture around the top of the valve bonnet or resistance during stem travel often indicates that the valve stem seal has degraded and requires a new packing maintenance kit

Johnson Controls A19ABC-42 Utility Thermostat 30067439-890 ensuring the unit cuts powerThe Johnson Controls A19ABC 42 is a heavy duty immersion control utility thermostat engineered for precise temperature management in hydronic heating systems and industrial boiler applications. This SPDT temperature control operates across common line voltages including 120 208 240 Vac, making it a versatile choice for field replacements. It features a broad 100 to 240 degree temperature range with a sensing element consisting of a liquid filled