While designed for RS series sensors

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

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

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

providing versatile application across various duct sizes

Johnson Controls A19BBC-4 Utility Thermostat 30067439-890 While designed for RS seriesThe 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