The IDEC RR3B-ULAC24V is a heavy-duty 3PDT relay engineered for reliable switching in demanding HVACR and industrial control environments

System Reliability: High-grade sensors ensure consistent millivolt generation for stable burner operation

features a 3/8-inch outer diameter (OD) rod construction to ensure structural rigidity under hydraulic pressure

Direct OEM Fit: Simplifies installation by utilizing existing mounting points in the blower housing

these part numbers refer to the same Honeywell panel mounting board and are functionally interchangeable

Fenwal 22-100000-593 Ignitor The IDEC RR3B-ULAC24V is aThe Fenwal 22 100000 593 Universal Ignitor is a high performance silicon carbide ignitor designed for professional grade reliability in gas fired heating applications. This hot surface ignitor serves as a critical HVAC replacement part, engineered to withstand extreme thermal cycling and provide consistent ignition for furnaces, boilers, and water heaters. As a versatile direct spark ignition component, it is specifically manufactured to replace