Oven electrics .. tripping fuse

[Mudball]

Not sure what’s going on.. our electric oven seems to be tripping the ring fuse . The oven itself is switched on, and I can see the time on the display. So the oven fuse at the outlet is fine

However if I set the heating and turn it on, it takes down the ring. What am I missing?

 

[GreiginFife]

Not sure what’s going on.. our electric oven seems to be tripping the ring fuse . The oven itself is switched on, and I can see the time on the display. So the oven fuse at the outlet is fine

However if I set the heating and turn it on, it takes down the ring. What am I missing?

Sounds like it’s an overload as the heating element is where all the current draw is.

What is the oven current rating and the rating of the breaker?

 

[jim8flog]

Have you got one of those ovens which just plug in to a 13amp wall socket?

I was surprised to see those in our local store.

If it is an older oven which has been working well for years sounds like the heating element has had it or the fan if it is a fan oven.

 

[Mudball]

Sounds like it’s an overload as the heating element is where all the current draw is.

What is the oven current rating and the rating of the breaker?

Have you got one of those ovens which just plug in to a 13amp wall socket?

I was surprised to see those in our local store.

If it is an older oven which has been working well for years sounds like the heating element has had it or the fan if it is a fan oven.

It’s a Neff.. about 6 or so years ago.. it is a plug in.

It was working fine till yesterday. So the ring can take it too.

This just happened for the first time.

 

[GreiginFife]

It’s a Neff.. about 6 or so years ago.. it is a plug in.

It was working fine till yesterday. So the ring can take it too.

This just happened for the first time.

Still sounds like an overload. As Jim says the element might have developed a fault causing a current spike.

 

[Fade and Die]

It’s a Neff.. about 6 or so years ago.. it is a plug in.

It was working fine till yesterday. So the ring can take it too.

This just happened for the first time.

You have a faulty element. You can probably turn on the grill if it has one no problem? If you can it proves it’s the main oven element.

Straightforward to replace.

 

[Mudball]

Ahh interesting… I put it on bread which is our lowest .. 40 degrees.. it ran for about a min and warmed up.. then it tripped the ring…

 

[KenL]

In my experience, a new oven element will fix this. Easy diy and not expensive.

 

[Fade and Die]

Ahh interesting… I put it on bread which is our lowest .. 40 degrees.. it ran for about a min and warmed up.. then it tripped the ring…

So does turning on either the grill or the oven both trip the ring? If they do then it’s a bit more complicated than just a faulty element.

BTW is it just a MCB circuit breaker or does it have a little test button on it making it a RCBO?

 

[Tashyboy]

My cooker is a Neff, and we have had the grill changed recently. The display at the top was getting unbearably hot. The fitter said the fan had gone.As it happened it was sticking and he managed to free it. He showed me a price for the replacement Bosch fan. £210. It is working okish now but he has said he changes half a dozen of the neff ovens a year. Mostly around Christmas time. He said he will salvage one for us.

 

[Bunkermagnet]

Not sure what’s going on.. our electric oven seems to be tripping the ring fuse . The oven itself is switched on, and I can see the time on the display. So the oven fuse at the outlet is fine

However if I set the heating and turn it on, it takes down the ring. What am I missing?

At least one of the elements will be down on it's insulation to earth.
Ideally you need a mega meter, or if not a decent multimeter. You will need a torx20 driver to remove the rear access panel, and you must meter them each with the wiring tags off the element. Obviously the power must be off first.
What part of the country are you in out of curiousity?

 

[cliveb]

We had an oven that tripped the breaker only once it got above about 205°C.
Turned out the main element had a short, but weird it only happened in those circumstances. Surely the element itself will be at a fixed temperature while it's on?

 

[Bunkermagnet]

We had an oven that tripped the breaker only once it got above about 205°C.
Turned out the main element had a short, but weird it only happened in those circumstances. Surely the element itself will be at a fixed temperature while it's on?

Moisture inside the element, breaks down as they get hotter. Not unheard of

 

[Fade and Die]

We had an oven that tripped the breaker only once it got above about 205°C.
Turned out the main element had a short, but weird it only happened in those circumstances. Surely the element itself will be at a fixed temperature while it's on?

It’s likely to be thermal expansion of the materials in the element, once the temperature of 205•C was reached it distorted enough to cause a short circuit.

 

[Bunkermagnet]

It’s likely to be thermal expansion of the materials in the element, once the temperature of 205•C was reached it distorted enough to cause a short circuit.

Normally the element end caps are allowing atmospherei ngress, a short normally blows a hole in the element, moisture ingress doesn't and just trips at a lower resistance to earth.

 

[Mudball]

So .. have run it for an hour with the bottom heating only… looks fine and at 150C


Now going to try the top element .. I m now going to try the upper element . Assume it will blow
(Update to follow)

 

[Bunkermagnet]

So .. have run it for an hour with the bottom heating only… looks fine and at 150C


Now going to try the top element .. I m now going to try the upper element . Assume it will blow
(Update to follow)

The only way to test is with a good multimeter or mega insulation tester.
I can't tell you how many ovens I have attended where more than 1 element is required due to low insulation levels.

 

[Mudball]

The only way to test is with a good multimeter or mega insulation tester.
I can't tell you how many ovens I have attended where more than 1 element is required due to low insulation levels.

Not sure what is going on..

It worked with the bottom element
Then tried the top element.. worked
Then both.. still worked

So put it to self clean… and it worked!!

No idea what caused it to trip the circuits yesterday…

 

[Bunkermagnet]

Not sure what is going on..

It worked with the bottom element
Then tried the top element.. worked
Then both.. still worked

So put it to self clean… and it worked!!

No idea what caused it to trip the circuits yesterday…

TBH, you won't until the elements are metered/insulation tested.

 

[Pants]

Any other power hungry appliances on the same circuit on at the same time? (Layperson's thought based on having had similar problem when washing machine, tumble drier, microwave on together)