Hot Surface Ignitor - issue AO Smith Unit


Old 01-05-12, 10:36 AM
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Hot Surface Ignitor - issue AO Smith Unit

Heater suddenly began to malfunction over a week and it finally ceased to function. Upon reviewing A.O. Smith documentation diagnostics indicate that there is an issue with the hot surface ignitor, I took it out of boiler and for the hell of it cleaned with some steel wool and replaced, still did not work, unit looks fine to my untrained eye, before I buy a replacement unit and or bite the bullet and bring in a plumber is there anything else I could try.

Any help would be appreciated.
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Old 01-05-12, 04:00 PM
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Is this a domestic water heater? or a home heating system?
Old 01-05-12, 04:05 PM
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What is the model # and first 5 didgits of s/n?

And if intellivent gas valve whats the code?

If smart valve how many blinks?

Also you cant clean the igniter itself, but the flame sensor you can.

Once you post the model and s/n I can guide you better.

Mike NJ

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