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A. O. Smith water heater error 2 flashes
Low thermopile voltage. The pilot flame is weak or the thermopile is worn out.
Moderate · you can check this yourself
2 flashes
Meaning: Low thermopile voltage
What causes 2 flashes
The pilot flame is weak or the thermopile is worn out.
What to do
Relight the pilot. If it keeps going out, the thermopile needs replacing.
Can I fix it myself?
Often, yes. Try the check below first — it costs nothing and frequently clears the code.
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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