Johnson Controls A421ABC-03 Temperature Control R-410A preventing hazardous conditions resulting from

preventing hazardous conditions resulting from flue gas spillage or heat exchanger breaches

providing precise pin and port alignment that prevents liquid pressure fluctuations from affecting valve performance

When dealing with a unit that has tripped on high-limit or failed to initiate heating

Common Questions: How do I know if I need the first check or second check kit

Rugged Construction: Features a galvanized steel base plate and a rigid thermoplastic housing to withstand high-traffic commercial environments

Johnson Controls A421ABC-03 Temperature Control R-410A preventing hazardous conditions resulting fromThe Johnson Controls A421ABC 03 Temperature Control is a versatile, line voltage electronic thermostat engineered for high accuracy temperature management in HVAC and refrigeration systems. Operating on 120 240 VAC, this single stage control features a Single Pole Double Throw (SPDT) relay output, making it the industry standard direct replacement for the A319ABC 07 01 and A419ABC 2 models. The unit provides a broad temperature control range of 40 to