Hi guys,

Boiler = Old Myson one with water Tank, emersion heater etc

My boiler has developed a strange habit. It randomly fires up during the day for about a minute each time. As the electric valves are shut and the pump is off it just heats up the water in the pipes closest to the boiler which is a bit worrying.

Does anyone know whats going on? My guess is that there's something wrong with the control box? If thats the case are they easy to get replaced as the current one is very old?

Thanks in advance

Replies

  • alanobrienalanobrien Forumite
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    whufc wrote:
    Hi guys,

    Boiler = Old Myson one with water Tank, emersion heater etc

    My boiler has developed a strange habit. It randomly fires up during the day for about a minute each time. As the electric valves are shut and the pump is off it just heats up the water in the pipes closest to the boiler which is a bit worrying.

    Does anyone know whats going on? My guess is that there's something wrong with the control box? If thats the case are they easy to get replaced as the current one is very old?

    Thanks in advance

    By control box if you mean timer these are fairly easy to replace especially if your existing unit has an industry standard back plate.

    Personally i would have it checked out.....sounds like a very odd fault to me.
  • moneysavingplumbermoneysavingplumber Forumite
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    Strange fault indeed. Is it firing the pump at the same time? Could be the motorised valve switch making a circuit somehow temporarily.
  • whufc_3whufc_3 Forumite
    43 Posts
    Thanks for the replies guys appreciate it.

    moneysavingplumber - the pump isn't running when this happens.

    I had the motorised valves and pump replaced about three months ago as they were very old and one of the valves was sticking open causing the heating to stay on permanently! Maybe there is a loose wire or incorrect wiring in the junction box thingy?
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