What kind of fuse is this?

[kissinger]

I’m trying to repair a microwave that suddenly stopped working. I tried changing the fuse at the plug but it didn’t fix it, so now I’m trying the fuse inside the microwave. I mistakenly assumed it would be the same size as a standard plug fuse when I ordered a replacement but it’s actually quite a bit bigger.

Anyone got any idea what this fuse type is? (It’s the top one I need to replace.)

 

[EFLImpudence]

What does the writing stamped on it say?

 

[333rocky333]

Looks like a 32mm ceramic fuse, house fuses are nearer 25mm

 

[kissinger]

It says 250v 10a.

 

[Robin0577]

Does it have a letter T or F in front of the 10A?

F means fast, T means time delayed (aka antisurge)

F - https://cpc.farnell.com/unbranded/mcf07c-10a/fuse-ceramic-quick-blow-10a-10pk/dp/FF01781

T - https://cpc.farnell.com/unbranded/mcf08c-10a/fuse-ceramic-antisurge-10a-10pk/dp/FF01800

 

[SFK]

I tried changing the fuse at the plug but it didn’t fix it, so now I’m trying the fuse inside the microwave.

Robins questions should be answered,
but....
Have you tested the fuse, has it actually failed?
SFK

 

[flameport]

If it has failed, it's probably new microwave time.

 

[kissinger]

If it has failed, it's probably new microwave time.

i haven’t got the tools to test. I was just going to replace because fuses are cheap. Can I not just replace and hope for the best?

 

[SFK]

[

Can I not just replace and hope for the best?

Yes, but you will not know if it then fails again.
Also the issue with blow fuses is that it suggests something else has failed that then blew the fuse.

A multimeter is a useful and relatively cheap tool (other brands and suppliers avalible). This beeps if there is a connection (if fuse has not blown)
https://www.amazon.co.uk/AmazonCommercial-Manual-Ranging-Digital-Multimeter/dp/B083V82H97/

Sfk

 

[kissinger]

Thanks. Is that a decent one to get?

I think the problem came from having the microwave in our freezing cold garage.

 

[SFK]

Not used. But I would be happy with it for home use.
Slightly cheaper one from Screwfix, but cannot remember if it makes a beeping noise for continuity testing (had a quick look and I think you have to use resistance setting - so Amazon one might be better fit you.)

https://www.screwfix.com/p/lap-ac-dc-digital-multimeter-600v/75337

 

[RandomGrinch]

Please be careful poking around inside a microwave, if you don't understand what's going on!
The charge from a microwaves capacitors can cause serious harm (if by chance, the fault isn't with the fuses).

 

[mattylad]

If the fuse has gone the magnatron is usually what takes it out.
BY all means try and replace the fuse but expect it to fail immediately and do not test without all the covers on.

 

[kissinger]

So there’s basically no point replacing fuses to fix a broken microwave?

 

[flameport]

No.
Fuses fail because something else did.
The something else will usually cost more than a new microwave.