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Beckett oil burner lock out

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geo65
geo65 Member Posts: 3
Oil boiler goes into lockout.  It runs fine from cold up to 160 degrees then starts to sputter and locks out.  I have been restarting it twice a day from cold and it does the same thing each time.  I can see oil in the tiger loop. 

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  • Jamie Hall
    Jamie Hall Member Posts: 23,554
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    Oil burners are not a DIY appliance -- I'd suggest a competent tech.
    Br. Jamie, osb
    Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England
    STEVEusaPAMikeAmannEdTheHeaterManSuperTech
  • geo65
    geo65 Member Posts: 3
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    Thanks, techs are backed up.  
  • Dave Carpentier
    Dave Carpentier Member Posts: 604
    edited October 2022
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    Not much to do for simple diy, since it's running (ie, you have power, oil and the thermostat works).
    Has it been cleaned/serviced recently ? Do you get black smoke out of the chimney while it's running ?

    If it has a primary that contains a cad cell self-check, you could utilize that to check cad cell resistance.
    On mine, I start the burner and wait a bit for things to stabilize, press the reset button once. The light will flash a number of times to represent the resistance of the cad cell. 4 flashes means replace the cell, 3 is getting marginal but ok, 2 and 1 are good.

    Not to overstate the obvious.. but you have a burner that is entering safety lockout. There's always the possibility that it's a serious situation.
    30+ yrs in telecom outside plant.
    Currently in building maintenance.
  • EBEBRATT-Ed
    EBEBRATT-Ed Member Posts: 15,764
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    sounds like an oil restriction. You oil filter could be plugged up or the oil strainer in the pump could be dirty. When the boiler sits idle the oil seeps through the plugged filter and strainer slowly so the burner has enough oil to start. It then uses that oil up and goes on lock out.

    You need an oil burner tech to track this down
    EdTheHeaterMan
  • EdTheHeaterMan
    EdTheHeaterMan Member Posts: 8,157
    edited October 2022
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    If the oil filter is partially plugged, the the partial vacuum in the tiger loop will eventually balance out with oil seeping thru the blocked oil filter over time as @EBEBRATT-Ed said. Once you reset it, the clock starts ticking, how long will it take to use up the oil on the fuel pump side of the filter. 3 minutes? 4 minutes? 8 minutes? I will wager just long enough for the temperature gauge to reach about 160°

    As the oil filter becomes more clogged, that time will become shorter and shorter. At some point, the technician will need to arrive and find that oil filter completely covered with mud, sludge and other tank bottom deposits.

    OR

    You could try replacing the fuel filter.

    After that, the rest of the blockage problem if any, are for the professionals.

    Edward Young Retired

    After you make that expensive repair and you still have the same problem, What will you check next?

  • geo65
    geo65 Member Posts: 3
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    Thanks.  Yes it was serviced 1 year ago.  I was leaning towards a lack of fuel but didn’t think it would take that long.  your suggestions have me thinking that itbin the strainer.  I will pick up a cad cell tomorrow, change the filter and check the strainer if he isn’t able to get here very soon.  
  • Dave Carpentier
    Dave Carpentier Member Posts: 604
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    An inline filter should be okay after only a year, but ya never know what might have gotten stirred up and put thru the line. A big flake of rust or some muck might be at your tank exit port too, causing a restriction.
    I didnt mean to imply that you should change the cad cell, just that it's sometimes an easy thing to test without specialty tools or training if the primary includes a self test function (but you can also test cad cells with an ohmmeter). But, easy enough to change out if you wanted to try that.

    30+ yrs in telecom outside plant.
    Currently in building maintenance.
  • EBEBRATT-Ed
    EBEBRATT-Ed Member Posts: 15,764
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    If you run your tank low you may suck up some sludge