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A. O. Smith water heater error 8 flashes
Pilot stays lit after shutdown. The pilot valve is stuck open.
Serious · needs a technician
8 flashes
Meaning: Pilot stays lit after shutdown
What causes 8 flashes
The pilot valve is stuck open.
What to do
Turn off the gas supply and call a technician.
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