Question about Bosch Therm 830 ES NG Internal Tankless Water Heater - Natural Gas
Check for a green wire near the top right of your machine. It would loop back to itself with a little black heat shrink on it. This should be far away from the heat exchanger. if its near it, I would recommend pulling it out of the wire clips, and relocating it to behind the control unit on the right side of the machine. Keep it away from heat....its a resistor, and will pop random A3 codes if the heat increases its resistance. Reset your code and you'll be good to go.
Posted on May 06, 2014
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Posted on Jan 02, 2017
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