The thermal fuse on a Rinnai K26i continuous flow water heater is a critical overheat safety device, and this harness is what connects it to the control system so the appliance can shut down safely if it overheats. Without a sound connection between the two, that safety monitoring can't function as intended.
This is the genuine Rinnai harness, made to the same specification as the original fitted at the factory, restoring proper communication between the thermal fuse and the control electronics. Where the original harness has failed, corroded, or been damaged, replacing it with the genuine part puts the safety circuit back to full working order and keeps the appliance compliant with the safety monitoring it was designed around.
⚠ Important: This is a safety-critical component and must only be installed or serviced by a Gas Safe registered engineer or suitably qualified professional. Always isolate the gas supply and disconnect the electrical power before starting work.
Key Features & Benefits
Genuine Rinnai Part: Made to Rinnai's own specification for correct fit and function.
Restores Overheat Safety Monitoring: Connects the thermal fuse to the control system as designed.
Reliable Signal Path: Maintains a sound electrical connection between the fuse and the PCB.
Direct Fault Fix: Replaces a damaged or degraded harness causing safety circuit faults.
Built for Appliance Conditions: Constructed to withstand the operating environment inside the unit.
Ideal For
Rinnai K26i continuous flow water heaters.
Servicing and safety circuit repairs.
Gas Safe registered engineers.
Domestic and commercial installations using the K26i.
Common Problems This Part Will Fix
Broken Overheat Safety Circuit: Restores the connection between the thermal fuse and control system where the original harness has failed.
Corroded or Damaged Wiring: Replaces a harness where connector or wiring damage is interrupting the safety signal.
Intermittent Shutdown Faults: Resolves faults caused by a poor or inconsistent connection in the thermal fuse circuit.
Appliance Locking Out on Safety Fault: Addresses lockouts linked to the control system losing communication with the thermal fuse.
Why Buy This Product?
This harness carries the signal that lets your K26i shut down safely if it overheats, so it's not a component worth leaving in doubt. Fitting the genuine Rinnai part restores that safety circuit properly, rather than relying on a harness that may already be part of the fault. It's a straightforward, low-cost fix for a component with a genuinely safety-critical job.
Order the Rinnai K26i Thermal Fuse Harness Assembly online today.
