door open warning

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    Harman Accentra 52i-TC (Door Open Warning)

    I have a newly installed Accentra 52i-TC using as my main source of heat that keeps giving me a door open warning. It was a self install, zero clearance box, direct vent (Runs up about 3', 45 bend, 16", another 45, then slightly uphill going outwards. Its been running for about a week today, but...