Rheem-Ruud 47-21663-01 Limit Switch which indicates a block or

which indicates a block or incorrect orifice sizing

Precise Thermal Response: Fixed L135-15F rating provides reliable system shutdown at 135°F to protect critical heat exchange components

technicians should inspect the venting and heat exchanger integrity immediately

Its robust plating and corrosion-resistant housing make it suitable for demanding commercial environments

Rheem-Ruud 47-21663-01 Limit Switch which indicates a block orThe Rheem Ruud 47 21663 01 Limit Switch is a high precision, OEM replacement furnace limit switch designed for critical thermal protection in HVAC systems. This SPST normally closed switch is engineered to monitor heat exchanger temperatures effectively, featuring a fixed open temperature of 140 degrees F and a fixed close temperature of 130 degrees F. As a general purpose limit switch, it utilizes an auto reset mechanism, ensuring the system resumes