Lochinvar & A.O. Smith 100208180 Rollout Switch

The Lochinvar & A.O. Smith 100208180 Rollout Switch is a critical safety component designed for high-efficiency water heaters and boilers. This manual reset thermal switch acts as a flame rollout limit, monitoring the burner vestibule for excessive heat or flame spillage that indicates combustion issues or flue blockages. Rated for specific temperature thresholds, the 100208180 ensures the system shuts down power to the gas valve if temperatures exceed safe operating parameters. This part is a direct replacement for HLC2904 and HLC2904K, making it a versatile HVAC replacement part for diverse commercial and residential applications. When troubleshooting Lochinvar boiler error codes related to ignition or limit circuits, verifying the continuity of this switch is a standard diagnostic step. For contractors, stock this OEM water heater part to ensure rapid service restoration while maintaining the manufacturer’s safety listing and ensuring proper boiler safety limit performance.

Key Benefits

• Precise Thermal Protection: Engineered to trip at exact factory-set temperatures to prevent cabinet damage and hazardous combustion conditions.
• Cross-Brand Compatibility: Fits a wide range of Lochinvar and A.O. Smith units, serving as an identical replacement for HLC2904K.
• Manual Reset Functionality: Requires technician intervention after a trip, ensuring the underlying cause of the rollout is identified and corrected.
• Durable Construction: Built to withstand the high-heat environment of a burner compartment without premature fatigue.

Common Questions

What causes a rollout switch to trip on a Lochinvar boiler?
Tripping is typically caused by a heat exchanger blockage, poor venting, or inadequate combustion air, forcing flames to "roll out" of the burner area.

Can I bypass the 100208180 for testing purposes?
Jumping a rollout limit switch should only be done momentarily by a qualified technician to confirm the circuit path; never leave a safety switch bypassed during operation.

Is this switch compatible with residential A.O. Smith water heaters?
Yes, this manual reset rollout switch is utilized across several residential and commercial platforms where 100208180 is specified in the parts list.

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.