Reznor 202048 Hi Limit

When you are troubleshooting a unit that is tripping on high temperature, the Reznor 202048 high limit switch is the critical safety component you need to inspect. This genuine OEM Reznor replacement part is a 240-degree high limit control engineered with an automatic reset function, ensuring the system remains protected against heat exchanger overheating while allowing for restored operation once safe temperatures are achieved. Identified by its distinct silver dot, this SPST limit switch is built for the rugged demands of commercial and industrial gas-fired heating equipment.

For field technicians, compatibility is straightforward. This HVAC high limit control is designed for a broad range of Reznor unit heaters and duct furnaces. It is a standard component for the Reznor UBX, UBZ, UDBP, UDBS, and SC series units, specifically catering to models like the 175, 200, and 350. By utilizing this exact Nortek Global HVAC part, you maintain the original safety specifications and factory performance of the heating system without the risks associated with generic alternatives.

Key Benefits for Technicians:

• Precise Thermal Protection: Fixed 240°F temperature limit prevents heat exchanger damage and ensures safe operation.
• Auto-Reset Functionality: Reduces nuisance service calls by automatically closing the circuit once the unit cools to a safe threshold.
• Verified Compatibility: Direct fit for Reznor UBX175, UBZ200, and UDBS350 models, among others.
• OEM Reliability: Manufactured by Nortek to meet the exact electrical and thermal tolerances of Reznor commercial heaters.
• Simplified Identification: Features a silver dot marking for rapid identification in the field.

Common Questions:

How do I know if my Reznor limit switch is bad?
If the heater’s fan runs but the burners won't ignite, check for continuity across the SPST switch terminals. If the switch remains open at room temperature, the internal bimetal disc has failed and the 202048 must be replaced.

Does this switch require a manual reset?
No, the 202048 is an automatic reset limit control. It will reset itself once the temperature drops below the cutout point. If your unit requires a manual reset, this may not be the correct part for your specific configuration.

Where is the silver dot located on the part?
The silver dot is typically located on the face or side of the limit switch body to designate the specifically calibrated 240-degree trip point used in Reznor factory specifications.

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.