- This topic has 10 replies, 4 voices, and was last updated 18 years ago by
.
-
Posts
-
Hi all,
Be gentle, as first time in what looks to be a godsend of a forum!
Following advice from ukwg online inquiry form, I have now obtained a new oven bottom element assembly for the above model.
The replacement comes from BSH Appliance Care, though I started off at Bosch’s own site…
It turns out that the replacment is of a sturdier design than the original, which looks promising, but a closer look at the spec leaves me a little puzzled, and I hope the experienced among you can explain.
Bosch site’s exploded diagrams seem to leave out the electrics, otherwise, perhaps I wouldn’t need to ask…
The assembly has an inner and outer ring, and four contacts in a line. Wires are white; red; brown; orange, and were originally connected in that order looking from the back of the oven.
What is confusing is that the inner ring is marked as 86/75V, but when I check the leads, they seem to be 250V throughout.
Have I got another problem elsewhere that has upped my 75V contacts, or is there some peculiarity of this particular model, that lets it run above the element rating?
For some time before the final failure of the old element – the inner, ’75V’ ring being the one that failed – the oven had had the very irritating habit of ‘resetting itself to 150 deg’ every time one turned one’s back (150 is where it rests even with no element, so presumably it just meant the circuit was intermittently going open). So, if this failure might have been due to the wrong voltage, I want to make sure I have things right before I put it all back together.
Much obliged for any light the experienced here can throw on this situation.
Cheers,
SRe: Bosch HBN6450GB/02 Oven bottom element connections/volts
The outer part of the element should have a feed to it of 230-250V, the inner should be fed with 90v.
This is a complicated appliance, if you are sure that you have connected the element up correctly then I would consider calling somebody out.
Please do not carry out any further live testing, power off before removing any panels :zap:
Re: Bosch HBN6450GB/02 Oven bottom element connections/volts
Thanks for the reply.
Wasn’t expecting anything this late at night!As I said: I have not connected up the element as I am seeking advice first rather than just going ahead and possibly risking blowing it.
Are you implying that there should be a 90V measured across the inner element while it is in circuit? Surely not?
I checked the voltage to make doubly sure which lead was which. And I can’t measure voltage without turning on some power to do it. Rest assured, it is securely turned off when not actually measuring.
As you seem to know something of this device can you confirm the correct connections as I asked?
Re: Bosch HBN6450GB/02 Oven bottom element connections/volts
Sorry I can’t give out wiring or technical advice. See rule 7 and 8.
Re: Bosch HBN6450GB/02 Oven bottom element connections/volts
Ah, so this otherwise handy looking site, turns out to be just another industry front after all.
Still, that’s one fewer entry in my favourites to remember.
Shame.
:rolls:S
Re: Bosch HBN6450GB/02 Oven bottom element connections/volts
Hi Spamlet
Ah, so this otherwise handy looking site, turns out to be just another industry front after all.
This is not a industry fronted front it is a large group of engineers who give their knowledge, advice and time free of charge to the general public and to others within the trade.
We as like with all other trades are legally obligated with any advice given out,We do not know if you are competent or not so we have to assume that you are not and will always assume this position.
If we give you certain advise that ends up you killing yourself or others then we could be held negligent.
If you have ordered the correct part and feel competent then fit it. IF NOT then get a qualified engineer to fit it and check it.
Bryan
Re: Bosch HBN6450GB/02 Oven bottom element connections/volts
For ‘closure’ readers might like to know oven is now up and running nicely.
Inner bottom element is in series with grill so the lower voltage was correct.
Identifying that this voltage was delivered before risking the new element turned out to be quite simple to establish after all, by just hooking up a kettle in its place. The slowest boil identifying the lower voltage wires even before any actual measurement was made.
The ‘temperature’ readout, IS fixed on 150 when there is an open circuit in the bottom element, so this is, as thought, a good indicator of when the element is failing.
So all sussed, but what a load of unnecessary hassle when a circuit diagram on the site that sold the spares (yes they never replied to my email once they had got their sale) – or even an indication inside the cooker itself – would have made things so much simpler. But then, as even the mains live is connected to a BLACK wire inside the machine itself, the object is clearly to confuse and prevent the householder from making his own repairs. Our rubbish dumps could be so much smaller…
Cheers,
S
Re: Bosch HBN6450GB/02 Oven bottom element connections/volts
Have you any concept of how dangerous that could possibly be to someone with little experience of electrical work?
I can see it now… “Oh that guy on the internet said we could hook a kettle full of water up to bare live wiring and test it” as they send themselves into a heart attack from a shock.
FWIW, there is an EU Directive that can hold YOU personally responsible for any damage caused by advice handed out to someone that isn’t deemed to be “competent”. So you’ve just exposed yourself to literally hundreds of potential people that could fry themselves. Well done, top job.
This is why there’s a line drawn with the information we are ALLOWED to make available. We won’t get sued, you will.
For whoever reads this in the future, DO NOT do this it is utter stupidity and incredibly dangerous.
DO NOT live test, it is actually illegal for a business to do it now for good reason, people get killed doing it!
K.
Re: Bosch HBN6450GB/02 Oven bottom element connections/volts
Good grief.
I’ve heard it all now. I can’t believe you would risk doing that to avoid paying a call out charge :rolls:
Re: Bosch HBN6450GB/02 Oven bottom element connections/volts
This post was really meant to update the earlier respondents rather than for ‘broadcast’: apologies for not being used to the open forum.
But, like I said: if the industry wasn’t so negligent in coming forward with requested information; there would have been no need for testing. Testing which was, carefully done despite your assumptions about how I may have made the connections.
No moderator has stepped in to remove this post so you have made this information available: not me.
(Call out fees – which I certainly can’t afford – are what sees so much electrical equipment just dumped. You might not like it, but that is the way it is for so many of us.)
Now that you have read the piece, please remove the thread.
S
Re: Bosch HBN6450GB/02 Oven bottom element connections/volts
Spamlet wrote:Now that you have read the piece, please remove the thread.
You can delete your own posts should you desire to do so and what you post is up to you, but you are responsible for your own publications. You wrote it, you published it, you’re responsible for it and as stated you hold copyright on it.
The industry, us included, is governed by UK and EU legislation, complain to them if you’re not happy with the structure in which we have to legally operate within. Whilst we may not agree with it all it is for people’s safety.
We don’t delete posts on a whim or without explanation.
As for my “assumption”, since ovens don’t usually come with kettle leads in them I think it’s pretty safe to say that however it was done it wasn’t exactly a recognised method and like I said, live testing is a banished practice across the EU.
K.
- You must be logged in to reply to this topic.