Johnson Controls A19ABC-42 Utility Thermostat 30067439-890 High-grade ceramic insulator prevents voltage

High-grade ceramic insulator prevents voltage leakage to ground for accurate microamp signal readings

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

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

This replacement solenoid coil features Class F insulation

Johnson Controls A19ABC-42 Utility Thermostat 30067439-890 High-grade ceramic insulator prevents voltageThe 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