After 1 year & 8 months my Bosch tankless water heater suddenly stop working with error code C2. I unplug to reset but after initialized still same error check vent pipes & termination or call qualified technician. So I open the cover and this is what I found and it fixed the issue without spending $$$.

RUV - Random Useful Videos

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This video is no shape or form of any advice, it is strictly intended for entertainment purposes only, thank you.

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