Johnson Controls A19BBC-4 Utility Thermostat 30067439-890 If your current wheel is

If your current wheel is fouled

making it a staple for line-voltage control in harsh conditions

5-inch diameter and a 20-degree pitch

Safety Optimized: The SPNO close on fall logic prevents gas valve activation if the venting system is obstructed or the draft is insufficient

Field technicians often prioritize this unit for its durability and precise fit

Johnson Controls A19BBC-4 Utility Thermostat 30067439-890 If your current wheel isThe 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