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Lockout Worcester heatslave 15/19

Discussion in 'Plumbing and Central Heating' started by Mike15/19, 8 Jan 2021.

  1. Mike15/19

    Mike15/19

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    The problem is more burner related
    Worcester heatslave 15 19 oil boiler
    It is a bentone b9 burner made in 1999
    With a danfoss bfp 21 l3 oil pump .

    The boiler will run fine with heating on but about 1 in every 3 or 4 times it goes to start up it will lock out , I will press the lockout button and it will run again .
    I can tell when it's going to lock out as i can hear a buzzing noise instead of it starting up like normal with the fan and then the ignition .
    It will only lock out like this on start up and never while running .

    I have changed the solenoid coil on the burner and checked and cleaned the filter ,
    Checked the photocell which was clean .
    Checked oil is coming as it could and bled the oil pump. Also checked the fan motor was spinning nice and freely which it was ,

    I am looking for advice before I go and further spending more money and taking more apart .

    And advice would be greatly appreciated

    Thanks
    Mike
     
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  3. Terrywookfit

    Terrywookfit

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    Motor capacitor and /or Tight spot on oil pump.
     
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  4. Mike15/19

    Mike15/19

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    Thanks , I will search online for more info on this now .
    is there any way of checking it is this and not the motor itself or the oil pump ?
    The oil pump does turn and is not siezed , but could I try run the boiler with the drive of the motor not attached to the oil pump ?
     
  5. Terrywookfit

    Terrywookfit

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    If you have a multimeter with a capacitance range measure it.

    The cap provides the phase change to give a rotating magnetic field.
    Under no load conditions it will probably work.
     
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  6. Mike15/19

    Mike15/19

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    Thanks , I'm not great with a multimeter , .I have been able to source a new motor with capacitor , and I may aswell get a new oil pump too as it's probably well over due , I will fit these tomorrow and let you know how I get on ,
    Thanks again.
     
  7. Terrywookfit

    Terrywookfit

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    Have you got an oil pressure gauge , Smoke pump and FGA.??

    If not just swap the cap !!!
     
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  8. Mike15/19

    Mike15/19

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    No I don't , that was going to be my next question about the pump if I will meet to get someone offtec certified to fit it ?
    Can I not change the motor without this ?
    I only ask because where I am buying it from locally tomorrow does not sell the capacitor on its own just with the motor , but I could always take itnof and fit it to my current one .
     
  9. oilhead

    oilhead

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    Just swap the capacitor.
     
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  11. Terrywookfit

    Terrywookfit

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    How much is the motor ?
     
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  12. Terrywookfit

    Terrywookfit

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    Btw it is not a requirement to be ofook reg to repair boilers.
     
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  13. Mike15/19

    Mike15/19

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    £70 , can get motor and capacitor tomorrow might be Tuesday to be able to get just capacitor , my house is cold. haha
     
  14. Mike15/19

    Mike15/19

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    I will try phone other places for just capacitor in morning ,
     
  15. Terrywookfit

    Terrywookfit

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    But you would save £50 !! Or lots more from some places.
     
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  16. oilhead

    oilhead

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    A 4mf capacitor of any size/mount can be employed and held to the motor by cable ties. There are only 2 connections and they are not polarised.
     
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  17. Mike15/19

    Mike15/19

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    Great , is there anywhere other than a heating supply shop that I might get one on a Saturday?

    Going to try my best with a multimeter tonight .
     

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