Most faults on a Rinnai HD70E trace back to the electric control unit — it governs the water flow sensor, the solenoid valves, and both servo motors, effectively running the whole system. When it fails, the effects are immediate: the appliance may not fire, temperature regulation stops behaving correctly, or you're left with error codes that persist through every reset attempt.
The HD70E's main processor, including its built-in temperature limiter, sits inside this control unit. Fitting a second-hand or non-genuine part risks throwing calibration out, losing dip switch settings, and disrupting any remote temperature controllers already installed. This genuine Rinnai control unit is built to the original specification, restoring the appliance's full functionality without any of that risk.
⚠ Important: All electrical work on this appliance must be carried out by a Gas Safe registered engineer.
The control unit is what makes everything else on the HD70E work, so it's not a component worth compromising on. This genuine part restores ignition, temperature regulation, and fault diagnostics as a complete set, keeps your existing remote controllers working without reconfiguration, and keeps the appliance's warranty position intact — something a non-genuine part can't guarantee.
Order the Rinnai HD70E PCB Control Unit online today.
| Manufacturer | Rinnai |
|---|---|
| Part Number | P70EV-700 |
| Compatible Model | Rinnai HD70E |
| Product Type | Electric Control Unit (PCB) |
| Appliance Type | Continuous Flow Gas Water Heater |
| Function | Controls Ignition, Temperature Regulation, Water Flow Servo, Solenoid Valves and Fault Diagnostics |
| Series | Rinnai V Series |
| Installation | Gas Safe Registered Engineer Required |
