AAON P21450 Firestat Manual Reset Switch

Description

The AAON P21450 Firestat Manual Reset Switch is a genuine OEM safety component engineered specifically for AAON commercial HVAC equipment. Designed to protect against dangerous overtemperature conditions, this firestat monitors supply or return air temperatures and interrupts the control circuit when a preset high-limit threshold is reached — helping prevent fire hazards and equipment damage.

Key Features

• Manual reset operation ensures the system cannot restart automatically after a high-temperature trip event, requiring a technician to inspect and clear the fault before resuming operation
• Genuine AAON OEM replacement part engineered to exact factory specifications for reliable, drop-in compatibility
• High-limit safety switch designed to protect AAON rooftop units and air-handling equipment from overtemperature conditions
• Interrupts the control circuit upon activation, shutting down the unit to prevent fire risk and downstream equipment damage
• Durable construction built to withstand the demanding environments of commercial HVAC applications

Application

The P21450 Firestat Manual Reset Switch is intended as a direct OEM replacement for compatible AAON rooftop units and air-handling systems. Always consult your AAON equipment documentation or service manual to confirm compatibility with your specific unit model before installation.

Why Manual Reset?

Unlike automatic-reset safety controls, a manual reset firestat requires a qualified technician to physically reset the switch after a trip event. This added layer of protection ensures that the root cause of the overtemperature condition is identified and corrected before the system is returned to service — a critical safety requirement in commercial HVAC installations.