Code index · 5 entries
Rinnai tankless water heater error codes
What does your Rinnai tankless water heater error code mean? 5 codes from official Rinnai tankless water heater documentation. Select a code for causes, how to fix it safely and when to call a pro. Rinnai manufacturer manual (PDF) (opens in a new tab) ↗.
4 of these 5 Rinnai tankless water heater pages are marked call-a-pro because the source document points at gas, venting, refrigerant, high voltage or a control the manual does not leave to a homeowner. The other 1 start with a check the document describes, then say when to stop.
Air supply or exhaust blockage, or the condensate trap is full.
No ignition: the heater is not turning on.
No flame.
Heat exchanger overheat.
Service soon: it is time to flush the heat exchanger.
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Source: Rinnai manufacturer manual (PDF) (opens in a new tab) ↗ · Last updated