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Fitted new element to this a few years ago, then got a call the other day to say it’s blowing the trip as soon as it reaches set temp (just as light goes out) but that once the trip was reset, it would continue to cook without problem, stat cutting in and out as normal, until cooled down and used on the next occasion.
I read on here about similar antics and one poster had succeeded in fixing the same fault by replacing element. Great I thought, can now do it in one trip.
So I did. And sure enough old element was distorted a little and beginning to crack, though tested fine cold. Fitted new element, which had no detectable earth leakage at 500v nor at 1000v. Tested by running up to 100C and allowing stat to cut out, then raising temp several times. Was satisfied I had cured it.
She’s been on the phone today and apparently, first time she used it, it tripped again and now trips every time, also when using grill! 👿
I am so happy to have something interesting like this to tackle :lol:. Just a pity it’s 7 miles out in the country and difficult to tie in another job with.
If anyone can shed any light on this it would be great.
Mike.Re: Neff B1430NOGB/02 sgl f/oven w. grill. Tripping problem.
Mike
Sometimes when you test elements at 1000V you can pop the insulation leaving a small pin hole which gets bigger as the element heats up.
Use a max of 500V when using the megger.
Also, I have had faulty elements in the past.
Without wishing to teach you to ‘suck eggs’, I always run the oven or cooker for about 5 mins and run up to about 150 deg C before I leave – generally, I suggest the customer puts the kettle on and we have a chat about the weather, politcs, you get the idea I’m sure – 5 mins soon flies by. I have caught a number of duff elements over the years using this method.
Sometimes ‘cold’ insulation testing’ does not show a duff element 👿
Regards
Re: Neff B1430NOGB/02 sgl f/oven w. grill. Tripping problem.
Thanks for the reply, Brains. Hmm. I did suspect something like that might be going on. But the sort of current put out by my megger which runs off a 9v PP3? I can’t imagine it could damage anything!
Anyway, going back Weds. Will get another element to take with me. Will post up the outcome.
Mike.I’m not sure of this model because i don’t have the details in front of me but its worth checking the base element , if it has one .
I’ve had a couple where the base element has low insulation and although its not neccassarily used in conjunction with the ring element , it is connected to it , and this was enough to cause the tripping.
As i say , not sure if you’re model has this set up but its worth checking the bottom element anyways , if it has one , just to be sure.
Re: Neff B1430NOGB/02 sgl f/oven w. grill. Tripping problem.
Thanks Paul. Will be pulling it out and getting in the back this time so I can see properly what’s going on.
Mike.Re: Neff B1430NOGB/02 sgl f/oven w. grill. Tripping problem.
Quote……’Thanks for the reply, Brains. Hmm. I did suspect something like that might be going on. But the sort of current put out by my megger which runs off a 9v PP3? I can’t imagine it could damage anything! ‘…… Unquote
Keep in mind that the test voltage is generated by an invertor. Its not the current that does the damage, its the voltage.Voltage tends to stress insulation dielectrics.
Keep in mind that with the old hand crank ‘Meggers’ as the current increases (due to insulation breakdown), the output voltage drops severely. Modern electronic meggers, tend to main output volts for quite a significant output current (i.e low insulation resistance).
HTH
Regards
Re: Neff B1430NOGB/02 sgl f/oven w. grill. Tripping problem.
Hmm. Could explain how sometimes I test an element when it arrives from wholesalers and it’s 20M. Test again day before going out with it, it’s 10M.
Keep it warm overnight, test again in the morning, 1.5M. Phone customer, tell ’em job’s off till I get another element! 😆
Mike.
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