allowing technicians to restore the airtight seal required for optimal pressure switch performance and induced draft blower efficiency

Direct Compatibility: Engineered specifically for Utica-Dunkirk boiler systems to eliminate field-modification guesswork

ensuring systematic HVAC maintenance standards are met for long-term operational reliability

Includes precision-machined brass LP orifices for accurate BTU input control

If the voltage drops below approximately 19VAC

Johnson Controls A19BBC-4 Utility Thermostat 30067439-890 allowing technicians to restore theThe Johnson Controls A19BBC 4 Utility Thermostat is a rugged, SPDT temperature control designed for heavy duty HVACR applications, including cooling towers, refrigeration units, and unit heaters. Engineered with a stainless steel coiled sensing element, this mechanical thermostat operates without the need for external power, making it a reliable choice for process temperature control in demanding environments. It supports high capacity electrical