Lennox 10K56 Switch

The Lennox 10K56 High Pressure Manual Reset Switch is a critical safety component designed for Lennox HVAC systems to prevent compressor damage due to excessive head pressure. This high pressure cutout switch features a single-pole, single-throw (SPST) configuration, engineered to open the circuit when system pressure exceeds the factory preset, requiring a physical manual reset to resume operation. This ensures a technician can diagnose the root cause of the pressure spike—such as a failed condenser fan motor or a blocked coil—before the system restarts. Built for high-stakes refrigeration and air conditioning applications, the 10K56 pressure control provides a reliable fail-safe, maintaining system integrity under demanding peak-load conditions. Its robust construction and precise calibration make it a standard OEM replacement part for ensuring HVAC system safety and compliance with operational pressure limits.

• System Protection: Effectively prevents compressor failure by interrupting the control circuit during high-pressure events.
• Manual Reset Feature: Forces a manual inspection of the HVAC unit before the system can be cleared for operation.
• OEM Reliability: Guaranteed Lennox 10K56 compatibility for seamless integration with existing control boards and wiring harnesses.
• Technical Durability: Engineered to withstand the vibration and temperature fluctuations common in commercial and residential condensers.

What causes this switch to trip in a Lennox system?
Tripping is typically caused by restricted airflow over the condenser coils, a malfunctioning outdoor fan, or an overcharge of refrigerant.

Can this switch be bypassed for testing?
While technically possible for a momentary diagnostic test, a high pressure switch must never be permanently bypassed as it leaves the compressor vulnerable to catastrophic failure.

Is the reset button located on the switch itself?
Yes, the 10K56 features a dedicated physical reset button that must be depressed once system pressures have stabilized back to safe operating levels.

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.