Lochinvar & A.O. Smith 100208489 Relay

The Lochinvar & A.O. Smith 100208489 Relay is a mission-critical DPDT (Double Pole Double Throw) switching component designed specifically for commercial and high-end residential hydronic systems. Operating on a 115V control circuit with a robust 3-amp contact rating, this relay serves as an exact OEM replacement for legacy part numbers RLY2050 and RLY2050K. As a veteran-grade HVAC induction relay, it ensures precise command over secondary circuits, such as louver power, external pump activation, or dry contact signaling in complex boiler management systems. If your diagnostic shows a failure in the boiler pump relay or an intermittent GV relay fault on the SMART SYSTEM display, replacing the existing unit with this genuine Lochinvar 115V relay is the most direct path to restoring sequence-of-operation integrity. The DPDT configuration allows for simultaneous control of two isolated circuits, making it essential for managing system pump and DHW pump calls without feedback interference.

• Exact OEM Replacement: Seamlessly replaces RLY2050 and RLY2050K to maintain the original manufacturer's engineering specifications.
• Dual-Circuit Control: The Double Pole Double Throw design allows a single 115V signal to manage two separate loads up to 3 amps each.
• High Compatibility: Frequently utilized in Lochinvar Knight and Power-fin boiler series for reliable HVAC control switching.
• Durable Construction: Built to withstand the high-cycle demands and thermal conditions found in mechanical rooms and hydronic control cabinets.

• Is this the correct fix for a "GV Relay Fail" error? While this part is a primary 115V relay, "GV Relay Fail" often points to the main control board's internal relay or the gas valve harness. Always test for 115VAC at the relay coil and check for stable line voltage before replacement.
• Can I use this relay for a 24V control circuit? No, current technical specifications for the 100208489 designate it for 115V/120V AC applications only.
• What happens if the relay contacts are pitted? Pitted contacts cause increased resistance, leading to intermittent pump operation or "No Heat" calls. Replacing the relay prevents further control board strain.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.