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Fault light flashing 1 flash per second

New board fitted after speaking with worcestor tech help line . Boiler fired up ok . next day after the boiler had been on a while and heated up the house the fault light started to flash . Pressed reset and boiler fired up . This then happened a second time .
Original fault was the fault light was flashing 4 times per second , the boiler would fire up the fan would start then slow down and then stop . There was only 110volts from the board to the fan , this was why the technical helpline said that it was a board fault .

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  • larry rosen May 11, 2010

    i need to clarify one point please what fuel are you using gas or oil?

    as your first comment indicates a gas/lpg boiler and windowmans indicates oil please confirm and i will attempt to assist you.

  • Dominic
    Dominic May 11, 2010

    Have you checked the power to make sure it is properly ground? If the power is reverse grounded or improperly ground boiler control circuit will malfunction.

  • 42windowman May 11, 2010

    Something not adding up here- there should only be a max of 115 volts in system at any point - there is also a 24 and 48 volt on control side . Power fluctuates between 110 and 115 at all times- this is not an indicator of a faulty board. I think -you have to access a couple things - is eye ( sensor )clean? Is there any danger of freezing in lines? Have you had any problems with pump in past and when was the filter last changed- The question I always dred asking are you using dirty fuel? I ask thes questions as the duration of flash indicates no fire detedted in most units and all of the above can cause this to happen

  • Anonymous Mar 25, 2014

    Boiler runs for 30 minutes then goes into lockout when reset comes back on and does the same

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Prior to writing the above fault I had asked the owner to turn the boiler temp controller , for the heating side, down just a fraction . I was phoned this morning to tell me that the boiler had stayed on allnight with no fault light . After consulting with the plumber who fitted the system it appears that there might not be a room stat ,

Posted on Dec 01, 2008

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