Question about Rinnai Toyostove Direct Vent Heater: Laser 30 Toyostove Direct Vent Heater Shipping

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Mpi monitor 422 heat problem

My mpi monitor 422 starts to heat after about 5 minute the burner status blinks and no fan operation

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  • Gail Stansberry
    Gail Stansberry Jan 01, 2009

    My heater is doing the same thing, let me know if you get any good answers.

  • sl5wysocki Jan 01, 2009

    Mine just started doing this after 2 years of trouble-free use.

    I'd be glad to hear about solutions...

    swysocki

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I had the same problem last night and this morning. Its in the manual. I had to take the fan off of the back and vaccuum out all of the dust/lint that built up and it was a lot. It is a safety feature. It's a overheating protection feature that usually triggers if there is build up in the fan, front vent or vent pipe to the outside. I hope this helps.

Posted on Jan 06, 2009

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Your 422 most likely failed flame verification. This is not a "do-it-yourself" fix. Call your local service person. There are a lot of reasons this can happen.

Posted on Jan 18, 2009

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Sleddog,

Your stove has probably never been serviced. There is a good chance the burner mat and burner ring need to be serviced. The mat lifts up on a corner and the ring warps, both of which make the flame not get onto the flame sensor. This causes the stove to light and then turn off. It quits way before the fan circuit calls for circulation, so no fan in the back. You will probably have to get a dealer to service your unit or do it yourself.

Tom Hawkins
hawkins111@gci.net

Posted on Jan 06, 2009

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