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 Tankless
Author: wcronin46 (CA)

My tankless water heater always starts to beep and gives me a code 12 and 79 whenever it rains hard. What could cause this.

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 Re: Tankless
Author: steve (CA)

If this is a Rinnai heater, here is a troubleshooting guide with codes. Codes 12 and 79 can be set with water leakage into the combustion chamber. [www.rinnai.us]

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 Re: Tankless
Author: North Carolina Plumber (NC)

It sounds as if an inspection of your vent termination is in order.

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