Question about Bosch & Tankless LP Hot Water Heater

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EA error msg on Bosh tankless unit

Make GWH-635-ES model...freezing cold temperature..pilot light won't ignite...did reset button..starts up but won't fire..no pilot light..can't get it to work...looked at flue outside..did have ice and snow..clear now..cold air vent blowing in cold air on tank as well snow was coming in..like a whirl wind between houses...that also was full of ice and snow..clear now..snow was blowing on tank is this caused by poor venting..or did it get wet somehow inside of pilot light area...and this is why its not igniting???? EA on unit displaying flashing.

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  • mechmykeb Dec 28, 2008

    same issue. getting EA code. Been just a bit below freezing. Was working for three morning showers, turned shower off and went to turn sink hot water on and got nothing but cold water. Now the unit gives a EA error code when the hot water is turned on.

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How I fixed it was got rid of it...support help never called back..and to get parts for it was looking into the new year can't go without a shower that long...can we now?

Posted on Dec 23, 2008

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There is a plastic tube that goes to the intake air to the nozzle on the gas valve...take it off and it will most likely light.... after call a tech... most likely a valve issue or a dirty burner

Posted on Jan 07, 2013

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http://www.digelair.net/pdfs/TECHLIT/BOSCH/MANUALS/Bosch-ProTankless_AM.pdf
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Upvote the help.
And take advantage of fixya expert assistance live.
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Fixya is always less expensive than a service call.

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