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Finally found the fault… severely burned magnetron antenna, although Ohms resistance tested fine at customers’ and at my workshop!
I replaced the magnetron, and after a few seconds on a microwave setting serious arcing clear to see.
Looking more closely with the magnetron removed shows arcing has burned a small hole through the cabinet casing.
jonty
Thanks Merv,
No access to the above BSH system.
In fact, I think I’m losing my marbles 😮
I decided to take another look at the fault/s and must confess that my test meter is faulty.
I thought some of the earlier readings were odd, (Ohms resistance fine) but very low voltage to and from the board to the transformer.
As Dave rightly stated, relays are either open or closed, leading me to recheck the above with an old analogue meter – which confirms 230 odd voltage to the transformer!
So, back to the drawing board when I have time tomorrow…
jontyI’ve done some further electrical tests, as advised by electrofix (Dave) and it does appear to be a board/relay fault.
Will provide customer quote, and update.
Regards,jonty
Thanks (once again) Dave,
The above Smeg dishwasher is at a couple’s second home, and I have received a message saying that they have decided to replace the dishwasher, even though it isn’t very old…
jontyWell, finally managed to access the above via several hidden screws, and removing some trim/decor, as suggested by matrixresonat – thank you.
In my view, these, and other appliances that I can think of, are not designed to be taken apart.
It would take someone who has assembled such machines many times, to dismantle and reassemble perfectly.
Regards,jonty
Typically, after around one week, the above Hoover has now given up the ghost… i.e. no power from where the flex enters the handle housing!
I have brought the vacuum back again, with a view to replacing the flex, yet it looks very much like some plastic parts will be broken in the process…
jontyThanks for your message Jem,
Yes, the cooling fan is fine, although I don’t know if it is wired through the selector switch or not.
Will need to return, and assess further.
Unfortunately, I’ve torn some knee ligaments playing cricket, so trying to prioritise, and rest the knee as much as possible.
jontyYes, I see.
Wondering if I should obtain and fit the violet/higher temp’ stat (225 degrees) as the black one is 180 degrees?
Perhaps the original is faulty, or activating at too low a temperature? I’m not sure, but I think the original is the violet…
jontyThanks for that Dave.
I’ve had another look at the above Hoover, and simply cannot see how it is possible to renew the flex.
As mentioned, where the cable enters the handle the cable disappears into the housing, which appears to be sealed, and would entail breaking it apart to fit the flex…
jontyIt’s looking very much like the power/inverter module is the cause.
I replaced the motor sensor yesterday, to no avail.
jontyThanks for your message kaibart,
However, I have ordered the drive motor sensor from Bosch as suggested/agreed with ray.t
I understand the main/power board may be faulty/the cause of one, or both problems, yet there is no motor action, along with the door interlock “jamming,” so I remain perplexed as to how a motor or board fault can be causing both problems…
jonty
Probably “over thinking” the problem/s, as I don’t have much experience with the above!
Initially had it in mind that the magnetron may have failed, and caused the board problem, as my customer said it tripped the electrics.
She has agreed for me to replace the board/programmer, which may well be the only problem, as mentioned.
Thanks again,
jonty
