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Navien water heater error E109
Fan motor fault. The combustion fan is not running correctly.
Serious · needs a technician
E109
Meaning: Fan motor fault
What causes E109
The combustion fan is not running correctly.
What to do
The fan needs testing and 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.
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