Rinnai Portable Heater Error Codes – Quick Guide
Seeing a flashing number on your portable gas heater? Use this guide to understand common meanings and what you can safely check before booking a service.
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Before you start
- Place the heater upright on a level surface (tilt/impact can trip a safety switch).
- Confirm the gas is ON at the meter/cylinder and at the appliance tap.
- Turn the heater OFF, wait 60 seconds, then turn it ON again (power reset).
- Clean both air filters and make sure the front louvre isn’t blocked.
- Ventilate the room and keep ambient temperature reasonable.
If the same code repeats after basic checks, stop using the heater and book a licensed service.
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Common Rinnai Portable Heater Error Codes
| Code | Meaning (general) | Safe things to try | Action |
|---|---|---|---|
| 00 | Mains power interruption during operation | Once power is stable, press ON/OFF to reset. | Retry once |
| 03 | Tilt/impact switch activated | Place heater level/upright; clear obstructions; reset. | Check position |
| 10 | Oxygen shortage (room air issue) | Ventilate immediately; ensure adequate room air; power cycle. | Stop & service |
| 11 | Ignition failure (no flame established) | Confirm gas supply ON; retry ignition up to a few attempts. | If repeats, service |
| 12 | Incomplete/unstable combustion detected | Ventilate; clean filters; power cycle. | Service required |
| 13 | Combustion control fault | — | Service required |
| 14 | Blocked filter / Overheat condition | Clean filters; clear front louvre; allow unit to cool. | If repeats, service |
| 16 | Room overheat | Lower room temperature; ventilate; try again later. | Retry when cool |
| 18 | Temperature sensor fault | — | Service required |
| 31 | Room temperature sensor fault | — | Service required |
| 32 | Overheat sensor fault | — | Service required |
| 33 | Overheat sensor fault | — | Service required |
| 34 | Overheat sensor fault | — | Service required |
| 62 | Fan motor fault | — | Service required |
| 70 | ON/OFF switch fault | — | Service required |
| 71 | Solenoid valve fault | — | Service required |
| 72 | Flame detection circuit fault | — | Service required |
| 73 | Internal communication error | Power cycle once. | If repeats, service |
These codes are common across many Rinnai portable gas heaters. Meanings and actions can vary by model and year—always refer to your unit’s official manual for exact instructions.
Book a Portable Heater Service
We repair, service, and safety-check portable gas heaters across all of Sydney & the Central Coast.
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- Compliance and safety report on request
FAQs
My heater shows 11 or 12 and won’t start. Make sure gas is ON and try the ignition sequence again. If it still fails after a few attempts, it needs a service.
Is it safe to keep resetting? Only once or twice. Repeating resets with the same code is unsafe—book a tech.
How often should I service a portable gas heater? Generally every 1–2 years, depending on usage and environment (pets, dust, etc.).