Aaon P91330 Limit

The Aaon P91330 is a precision-engineered fixed temperature limit switch designed for high-limit protection in Aaon rooftop units and air handling systems. Operating with a 210°F trip point and a 40°F manual reset differential, this safety control prevents heat exchanger damage and unsafe operating conditions by opening the control circuit upon sensing an over-temperature event. As a direct OEM replacement part, it ensures compatibility with existing HVAC safety strings and mounting footprints, maintaining the system's UL certification and engineering specifications. The P91330 limit control features high-quality bimetallic sensing elements for reliable thermal response and durable terminal connections to withstand the vibrational stresses common in commercial HVACR applications. For technicians performing HVAC furnace repair or preventative maintenance on Aaon equipment, utilizing this high-limit cutout is critical for restoring the factory safety sequence of operation and ensuring long-term equipment reliability under heavy cycling loads.

• Compatible with a wide range of Aaon rooftop unit models for seamless integration.
• Fixed 210-degree Fahrenheit trip threshold provides accurate high-temp protection.
• Provides a 40-degree reset differential to prevent premature equipment restart.
• Heavy-duty construction ensures resilience in high-demand industrial HVAC environments.
• Direct OEM specifications guarantee proper electrical ratings and circuit continuity.

Is the Aaon P91330 a manual or automatic reset limit?
The P91330 is typically configured as a manual reset or a high-differential safety limit to ensure a technician inspects the system for the cause of overheating before operation resumes.

What causes a 210F high limit to trip in an Aaon unit?
Common causes include restricted airflow from dirty filters, a failed blower motor, obstructed ductwork, or an over-fired gas valve setting.

Can I bypass this limit for testing purposes?
Bypassing a safety limit is only permissible briefly for diagnostic troubleshooting by a qualified HVAC technician and must never be left jumpered during regular equipment operation.

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.