Description
The Rinnai 105000175 is a genuine OEM thermal fuse harness assembly engineered specifically for Rinnai RU80 and RU98i condensing tankless water heaters. This critical safety component integrates a thermal fuse directly into the wiring harness, providing reliable overheat protection that safeguards both the appliance and the surrounding installation from damage caused by excessive temperatures.
Why Replace the Thermal Fuse Harness Assembly?
The thermal fuse harness assembly is a primary safety device within your Rinnai tankless water heater. If the unit experiences an overtemperature condition, the thermal fuse opens the circuit, shutting down operation to prevent damage. A blown thermal fuse will typically trigger a fault or error code and prevent the unit from firing. Replacing the assembly with a genuine Rinnai OEM part restores proper function and ensures the safety circuit performs to factory specifications.
Key Features
- Genuine OEM Rinnai replacement part — ensures precise fit and function
- Designed for Rinnai RU80 and RU98i condensing tankless water heater models
- Integrated thermal fuse provides automatic overheat protection
- Pre-assembled harness for straightforward installation
- Maintains factory safety and performance standards
- Helps clear overheat-related fault codes and restore unit operation
Compatible Models
- Rinnai RU80 Series Condensing Tankless Water Heater
- Rinnai RU98i Series Condensing Tankless Water Heater
Installation Notes
This assembly is intended for qualified HVAC/plumbing technicians and service professionals. Always disconnect power and gas supply before servicing. Refer to the Rinnai service manual for your specific model to confirm compatibility and follow proper installation procedures.
Order with Confidence from Jackson Systems
Jackson Systems stocks genuine Rinnai OEM replacement parts to help you complete service calls quickly and correctly. Order the Rinnai 105000175 Thermal Fuse Harness Assembly today and get your customer’s hot water back on line.







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