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Periodic fail

Fuzzy
Fuzzy Member Posts: 1
in Oil Heating

I have a Boch hot water heater with a Carlin EZ1 oil burner. The burner sometimes fails and will run fine after a manual restart for sometimes a day or even a month or two. I have, new nozzle, oil strainer, cad cell and igniter, set electrodes and it still will fail eventually. I have noticed sometimes at the end of a heating cycle the burner will shut off then restart right away and run for 5 seconds or so and then be fine. Hopefully someone has run into this and has a fix, thanks.

Comments

  • techforlife
    techforlife Member Posts: 42

    Many possibilities. What ohm reading are you getting from the cad cell? What is the make and model of the primary control?

  • mattmia2
    mattmia2 Member Posts: 11,711
    edited February 19

    when was the last time an oil burner tech cleaned it and checked the combustion?

    HVACNUTSuperTech
  • HVACNUT
    HVACNUT Member Posts: 6,572

    Not DIY.

    mattmia2bburdSuperTechEdTheHeaterMan
  • SuperTech
    SuperTech Member Posts: 2,519

    It probably doesn't need any replacement parts. It's probably a combustion issue or oil supply issue. You need a skilled oil burner tech who has the right tools to do the job. A combustion analyzer, oil pump testing manifold, digital multimeter and several other things. This isn't something solved DIY by firing the parts cannon at it.

  • Jamie Hall
    Jamie Hall Member Posts: 25,592

    I agree with all of the above, and it's all needed work, but… I have run into that problem and even after all that found that the primary control may be the problem. I do like the Carlin 70200S…

    Br. Jamie, osb
    Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England
    EdTheHeaterMan
  • EdTheHeaterMan
    EdTheHeaterMan Member Posts: 10,118
    edited February 20

    If you do not have the Carlin 70200S PRO primary control (with a 5 year warranty) then you are just guessing at the problem. …and by firing the parts cannon at the problem, so far, you have missed the target. The Carlin 70200S PRO has many diagnostic features that can pinpoint the cause of the burner lockout in the Error History Log. You may find that the Ignitor had low amperage on the flame failure cycle.  You may find that the flame failure happened during a run cycle.  You may also find that the flame failure is a result of the high resistance from the cad cell indicating that the cad cell is pointed at the wrong place and does not see the flame very well. along with many other error codes available. Each message will point me in a different direction to the source of the problem.

    When I get stumped by an intermittent failure, that never happens when I am there to see it, I recommend that Carlin primary control, so I can look back at each event in the log and find something like "No Ignition 34 cycles ago" in the log and address that problem, so I don't have to make an uneducated guess with a parts cannon.

    Edward Young Retired

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

  • Intplm.
    Intplm. Member Posts: 2,427

    When I hear this type of thing happening I have found, and on occasion, there is a dead spot in the motor.

    EdTheHeaterMan

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