Johnson Controls A25AN-1C Warm Air Limit Control SPST Manual Reset 25-215°F

The Johnson Controls A25AN-1C is an A25 Series warm air limit control designed for high-temperature cut-out applications in commercial and industrial HVAC systems. Featuring a Single-Pole, Single-Throw (SPST) open-on-rise switch configuration, this mechanical temperature control locks out when air temperature rises to the set point, providing a critical safety shutoff to protect equipment from overheating.

Typically installed in a return air duct, the A25AN-1C is wired to shut down air conditioning or ventilating fans when duct air temperature becomes excessively hot. Once tripped, a manual reset is required before electrical contacts can be re-closed — the trip-free reset lever prevents restarting until a technician physically releases it, ensuring the cause of the high-limit trip is investigated before the system is returned to service.

Key Features:

• SPST switch action — opens on temperature rise (open high)
• Set-point range: 25°F to 215°F (–4°C to 102°C); factory set at 125°F (52°C)
• Rod and tube type sensing element for positive, reliable control action
• Trip-free manual reset lever — prevents automatic restart after lockout
• Visible knob range adjuster with high-limit dial stop
• Mounting flange included for duct installation
• Compatible voltage range: 24 VAC to 277 VAC
• Maximum element temperature: 300°F (149°C)

The A25AN-1C is part of the Johnson Controls (PENN) A25 Series and is the direct equivalent of the A25AN-1, sharing identical specifications, mounting, and performance. UPC: 785028221407.