Description
The Weil McLain 383-600-309 is a genuine OEM Time Delay Relay designed specifically for use with Weil McLain SlimFit boilers. This relay plays a critical role in the boiler’s control sequence, providing precise time-delayed switching to coordinate system startup and shutdown operations — helping protect equipment, extend service life, and ensure safe, efficient hydronic heating performance.
Key Features
- Genuine Weil McLain OEM replacement part
- Designed for SlimFit series boiler applications
- Time delay relay function supports accurate sequencing of boiler control operations
- Engineered for reliable, long-term performance in hydronic heating systems
- Direct OEM replacement ensures proper fit and compatibility
Application
The 383-600-309 is a direct replacement relay for Weil McLain SlimFit boilers. Time delay relays are essential components in boiler control systems, managing the timing of electrical switching events to protect the heat exchanger, circulator pumps, and other system components during startup and shutdown cycles. Using a genuine OEM part ensures your boiler operates within manufacturer specifications.
Why Choose Genuine OEM Parts?
- Guaranteed compatibility with Weil McLain SlimFit boilers
- Maintains manufacturer warranty compliance
- Consistent performance and reliability
- Reduces risk of premature component failure







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