the bimetal disc in the limit switch may have weakened over time

identical to the PUM30003

NEMA 3R Protection: Weather-resistant housing allows for outdoor installation and protects against condensation

The kit is intended for field service and preventative maintenance in commercial and industrial environments where consistent flow control is essential

Utilizing a NEMA 48 frame diameter

Resideo AT40A1139 Transformer 322057-301 the bimetal disc in theThe Resideo AT40A1139 Transformer is a heavy duty 40VA power supply designed for reliable 24V control circuits in residential and light commercial HVACR applications. Engineered with a 240V primary and a 26. 5V secondary output, this NEMA Type D transformer ensures consistent voltage regulation for thermostats, zone valves, and gas valves. The channel frame mounting configuration allows for versatile installation directly onto a junction box or