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Honeywell gas control 5 flashes

zepfan Member Posts: 375
Customer has a water heater 10 year old ao smith. Filter and burner intake air area was cleaned about two months ago. Now the heater’s control is displaying a 5 flash sensor failure code. I assume that they are referring to the sensor in the control that measures the water temperature? Is the only solution to replace the control? I saw there was a way to reset it with a magnet, but given the fact that the control is 10 years old, I didn’t want to do a reset only for the problem to occur again in a couple days. Any responses would be much appreciated. Thanks to all 


  • ethicalpaul
    ethicalpaul Member Posts: 4,667
    > 5 Flashes: Sensor failure. The gas control valve must be replaced.

    You're going to gamble with this? Surely the risk isn't worth the cost of a control.
    1 pipe Peerless 63-03L in Cedar Grove, NJ, coal > oil > NG
  • kcopp
    kcopp Member Posts: 4,189
    edited May 24
    There is a legit reset procedure. (it does not involve a magnet.) It will by you some time and get hot back on.... usually doesn't work all that long.