Berko 410169001 Limit Switch

The Berko 410169001 is a professional-grade high-limit switch designed for critical thermal protection in Marley Engineered Products, including QMark and Berko wall heaters. This auto-reset limit switch features a ceramic housing to withstand high-temperature environments without the risk of plastic deformation or contact failure. Specifically calibrated for a 175-225F operating range, the 410169001 ensures the heating element de-energizes if internal temperatures exceed safe limits, preventing equipment damage and maintaining system integrity. As an OEM replacement part, it offers a direct fit for models such as the FRA1527, FRA2024, FRC4027, and FRC2024. The snap-action thermal disc provides reliable, normally closed (NC) operation, resetting automatically once the unit cools to its differential setpoint. For contractors performing maintenance or repairs on electric fan-forced heaters, this 410169001 limit switch is the standard component for restoring factory-spec safety operations.

• OEM Compatibility: Designed as a direct replacement for Berko, QMark, and Marley 410169001 heating units.
• Ceramic Construction: Superior heat resistance compared to standard plastic limit switches, ensuring long-term durability in fan-forced heaters.
• Automatic Reset: Eliminates the need for manual intervention by restoring circuit continuity once temperature returns to the safe 175-225 degree Fahrenheit range.
• Safety Compliance: Maintains the original factory thermal protection required for commercial and residential wall heaters.

Is the Berko 410169001 a manual or auto-reset switch?
This is an automatic reset limit switch. It will trip when the temperature reaches the upper limit and close back up once the heater has cooled sufficiently.

What causes a high-limit switch to trip repeatedly?
Frequent tripping is often caused by restricted airflow, a failed blower motor, or a clogged intake grille. Ensure the Berko heater is free of dust and obstructions before replacing the limit.

Will this work with QMark AWH series heaters?
Yes, the 410169001 is a cross-compatible part for various Marley Engineered Products, including certain QMark AWH and FRA series units. Always verify the part number in your specific unit's wiring diagram.

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.