Rinnai Boiler: Ignition safety test (forced E02 lockout)
Ignition safety test (forced E02 lockout) on a Rinnai boiler: Proves the flame-failure lockout works. Expect one start plus four retries, then a flashing E02.
Applies to: E50CRN; E75CRN; E75CRP; E110CRN; E110CRP
How to fix ignition safety test (forced e02 lockout): step by step
- Unplug the ionization cable
- Start SERV function 1
- Wait for the start attempts to finish and E02 to flash
- Reconnect the cable and reset the boiler
If the unit shows an error code, look it up: Rinnai Boiler codes
Source: Rinnai E-Combi Series Installation & Servicing Instructions (8U516009 V0116), p.63. Written in our own words as a summary; always check the original manual.
General guidance for qualified technicians. The manufacturer's installation and service manual and local codes always take priority. Aurora Star Tech is not affiliated with, endorsed by or sponsored by any equipment manufacturer; brand and model names are used only to identify equipment and belong to their owners.