Rheem-Ruud 47-19554-37 Limit Switch

The Rheem-Ruud 47-19554-37 Limit Switch is a critical OEM replacement part engineered for precise thermal regulation within various HVAC platforms. Featuring a Normally Open (NO) SPST switch configuration, this Therm-O-Disc 60T series control is calibrated for a 125°F fixed close temperature and a 100°F fixed open temperature. The 1/4-inch quick-connect terminals and flanged airstream mounting with a 3/8-inch maximum insertion depth facilitate straightforward integration into heat pump systems, furnaces, and air handlers. With an auto reset functionality and an enclosed disc face, this green color-coded component ensures consistent performance in high-amperage applications, rated up to 25A at 230 VAC. As a general-purpose limit switch, it is the standard specification for maintaining operational safety and sequence control in Rheem and Ruud residential and commercial equipment.

Technical Benefits:

• Direct OEM Replacement: Built to exact manufacturer specifications for Rheem and Ruud air handlers and furnaces, eliminating compatibility concerns.
• High Current Capacity: Robust 25A maximum current rating at 230 VAC supports demanding electrical loads in heavy-duty cycles.
• Simplified Identification: Industry-standard green color coding allows for rapid field identification and reduced diagnostic time.
• Automatic Reset: The auto reset mode ensures the system returns to normal operation once the thermal threshold is cleared without manual intervention.
• Secure Connection: Features 1/4 inch quick connects for a vibration-resistant electrical interface.

Common Questions:

What is the function of the Normally Open (NO) state in this limit switch?
In this sequence control, the normally open SPST contact remains open until the temperature rises to the 125°F close setpoint, at which point the circuit completes to activate secondary fans or safety interlocks.

Can I use this switch in non-Rheem equipment?
While designed as a Rheem-Ruud 47-19554-37 part, it serves as a general-purpose limit switch provided the 125°F/100°F temperature profiles and physical mounting dimensions match the application requirements.

What does the green color code signify on these controls?
The color code is a visual identifier used by technicians to match the specific thermal range and SPST switch type during maintenance or component swaps in the field.

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.