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Rinnai water heater error 72
Flame sensing fault. The flame rod is dirty or not sensing the flame.
Serious · needs a technician
72
Meaning: Flame sensing fault
What causes 72
The flame rod is dirty or not sensing the flame.
What to do
The flame rod needs cleaning or replacing.
Can I fix it myself?
No. This is a fault a technician should handle; keep using the appliance and it can get worse or become unsafe.
If the code comes back
Book a visit and add the code to the booking. A technician arrives knowing which parts to bring, diagnoses the water heater for a flat $89 and gives you an exact quote before doing any work.
Same water heater