Microwave fuse for a ZIP 932 25L microwave

Forums › Home Workshop DIY › Microwave fuse for a ZIP 932 25L microwave

duckDecoy

896 posts

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#320114 8-Jul-2025 11:57

My mother's microwave has stopped heating, the light works and the platter spins but nothing heats up. Google suggests it might be a blown fuse and I can try looking at that next time I am over there. I thought if they're cheap enough I might just buy it to save me multiple trips.

What I couldn't seem to find is a part number for it or any specs for it. Are these things all standard or something? Can anyone point me to one that would work?

elpenguino

3421 posts

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#3391854 8-Jul-2025 12:30

You have to be a bit careful working on microwave ovens. They've got a high voltage section and the radiating bit too. I dont know how easy it is to mess up the magnetron alignment but worse case scenario, you could end up with radiation leakage .

Bearing that in mind, you should find out if you can replace the fuse without getting a bite from the high voltage. I presume the fuse is on the low voltage side but I suggest you confirm that first !

Most of the posters in this thread are just like chimpanzees on MDMA, full of feelings of bonhomie, joy, and optimism. Fred99 8/4/21

duckDecoy

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#3391870 8-Jul-2025 13:41

elpenguino:

You have to be a bit careful working on microwave ovens. They've got a high voltage section and the radiating bit too. I dont know how easy it is to mess up the magnetron alignment but worse case scenario, you could end up with radiation leakage .

Bearing that in mind, you should find out if you can replace the fuse without getting a bite from the high voltage. I presume the fuse is on the low voltage side but I suggest you confirm that first !

Good on you for pointing this out, although I had seen this already on some youTube videos discussing where to find the fuse inside a microwave.

elpenguino

3421 posts

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#3391880 8-Jul-2025 14:08

nice, what format is the fuse (usually) ?

Most of the posters in this thread are just like chimpanzees on MDMA, full of feelings of bonhomie, joy, and optimism. Fred99 8/4/21

wellygary

8315 posts

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#3391882 8-Jul-2025 14:21

elpenguino:

You have to be a bit careful working on microwave ovens. They've got a high voltage section and the radiating bit too. I dont know how easy it is to mess up the magnetron alignment but worse case scenario, you could end up with radiation leakage .

Also from memory the H Voltage side can also remain live for a significant length of time after you pull the plug due to its capacitors, so worst case can be fatality....

larknz

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#3391960 8-Jul-2025 15:19

If the fuse has blown it may done so for a reason. A new fuse won't necessarily fix the problem.

SATTV

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#3391964 8-Jul-2025 15:25

The fuse is not the issue.

If the fuse had blown it would be dead dead, not just not heating.

FYI the fuse on a Microwave oven used to be called a HRC fuse ( high rupturing capacity ) many were sand / silica filed to prevent arcing when it blew, some later were on a spring.

If you dont know what your doing, do not open the microwave, they can be deadly even if they are unplugged as there is a very large capacitor in there in the voltage doubling circuit.

A microwave is cheap enough these days, just replace it.

John

I know enough to be dangerous

tweake

2391 posts

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#3392098 8-Jul-2025 17:43

as above. the fuse kills everything.

not heating is typically the high voltage side fault. would it even be a transformer/cap/diode these days ? most likely inverter and your not fixing one of them in hurry. see an appliance repair person if its worth it.

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Free kids accounts - trade shares and funds (NZ, US) with Sharesies (affiliate link).

tweake

2391 posts

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#3392099 8-Jul-2025 17:46

elpenguino:

You have to be a bit careful working on microwave ovens. They've got a high voltage section and the radiating bit too. I dont know how easy it is to mess up the magnetron alignment but worse case scenario, you could end up with radiation leakage .

you can't mess up the magnetron, they bolt in and there is no real alignment. however messing with the door alignment can create leakage.

duckDecoy

896 posts

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#3392120 8-Jul-2025 19:28

Seems like it will be a new microwave then. Thanks for the replies

Bung

6478 posts

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#3392168 8-Jul-2025 22:14

tweake:

as above. the fuse kills everything.

not heating is typically the high voltage side fault. would it even be a transformer/cap/diode these days ? most likely inverter and your not fixing one of them in hurry. see an appliance repair person if its worth it.

While it is less common in modern mw ovens some do have a separate HV fuse.

tripper1000

1617 posts

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#3392465 9-Jul-2025 16:06

Hi, my microwave blew its high voltage fuse (suspect someone ran it with metal inside). It's still going fine 5 years after I replaced the fuse. It is the old-school style with the heavy transformer. If you have the new lighter inverter style, the inverter is fragile and it is probably not cheaply repairable. (I've had no luck fixing them).

They are special high-voltage fuses. You can't go sticking a common 240v fuse in there because they don't stop high voltages (e.g. 2500 v) and won't protect correctly.

I got a generic brand H.V. microwave fuse from Ali-express, but I've also seen them on Trademe ( https://www.trademe.co.nz/5394167250 )

They vary in shape, and some have the wires welded to them.

After opening the microwave and confirming the blown fuse with a multi-meter, I found a replacement on line with the matching connections and current (amps). When it comes to voltage vs fuses, as long as it is the same or higher spec voltage, you are safe.

Many replacement microwave fuses come pre-wired with spade lug terminals, since on most microwaves the fuse wiring ultimately starts and finishes at a spade, regardless of the fuse configuration/shape in the middle.

Most modern microwaves are made by Midea (regardless of the branding) so have near identical wiring internally which helps greatly with part interchangeability.

tweake

2391 posts

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#3392491 9-Jul-2025 17:52

Bung:

tweake:

as above. the fuse kills everything.

not heating is typically the high voltage side fault. would it even be a transformer/cap/diode these days ? most likely inverter and your not fixing one of them in hurry. see an appliance repair person if its worth it.

While it is less common in modern mw ovens some do have a separate HV fuse.

yes, on the old ones its on the diode. often joined to the diode. if the fuse blows, replace the diode as well as its started leaking. many brands had them joined so you had to replace both. not to sure on the inverters but if a fuse has gone, something else has failed. some of the inverters had some common fail points.