61
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Rinnai · Tankless Water Heaters
Combustion fan failure detected.
Quick Answer
Error code 61 on your Rinnai Tankless Water Heaters means: Combustion fan failure detected.. This is usually fixable — see the step-by-step guide below.
Affected Models
Likely Causes
How to Fix It
1
Turn off unit and inspect for obvious vent debris.
2
Have technician verify fan spins freely and receives proper voltage.
3
Inspect wiring harness continuity.
4
Replace failed fan motor assembly.
5
Retest ignition and airflow post-repair.
Pro Tip
This issue typically requires professional diagnosis. Attempting this fix without proper training could cause further problems.
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