Description
The AAON R51280 is a genuine OEM 3″ high-limit switch designed specifically for use in AAON commercial HVAC equipment. Featuring an L195-30F designation, this limit switch is engineered to open at 195°F and automatically reset once temperatures drop by 30°F (reset point: 165°F), providing reliable overheat protection for heating systems and air handling units.
High-limit switches are a critical safety component in any forced-air heating system. When supply air or heat exchanger temperatures exceed safe operating thresholds, the limit switch interrupts the circuit to prevent equipment damage, heat exchanger failure, or fire hazard. The AAON R51280 ensures your unit shuts down safely under high-temperature conditions and resumes normal operation once temperatures return to a safe range.
Key Features
- Genuine AAON OEM replacement part — SKU R51280
- L195-30F designation: opens at 195°F, resets at 165°F (30°F differential)
- 3″ mounting configuration for direct OEM fit
- Automatic reset operation for convenient, reliable performance
- Designed for use in AAON commercial rooftop units and air handlers
- Protects heat exchangers and system components from overheating damage
Specifications
- Part Number: R51280
- Switch Type: High-Limit (Automatic Reset)
- Opening Temperature: 195°F
- Differential: 30°F
- Reset Temperature: 165°F
- Mounting: 3″
- Brand: AAON
Application
The R51280 limit switch is a direct OEM replacement for AAON commercial rooftop units and air handling equipment. Always verify your unit’s parts list or service manual to confirm compatibility before installation. For best results, replace limit switches as part of a routine preventive maintenance program or any time a nuisance tripping condition is diagnosed.
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