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tim smith
tim smith Member Posts: 2,738
Buddy of mine up north is helping a friend out on his prestige, getting error E03, wiring harness problem to gas valve. Anybody have any ideas, he is ohming out the harness right now but I have not ever had this error on the prestige. Boiler is 5 mos old. Thanks all in advance, Tim


  • Xc8p2dC
    Xc8p2dC Member Posts: 41
    Triangle tube?

    I think they use the MCBA control if so,

    E03 would be internal control failure
  • tim smith
    tim smith Member Posts: 2,738
    It was internal fault of resistor or diode in plug to gas valve.

    Plug and cord replaced, comes as one. Fixed. I got a little info from someone I know that this has been a hit and miss issue, not always but more than just one or two. Tim
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