Quick test for bad mosfets

You don't always need to replace all the mosfets although it is recommended.

[@jimdalton8724]

This is the best test I've found, keeping it simple. The only thing I'd suggest is explain that the "drain" is electrically connected to the back plate.

[@Dj_Walterpro_the_finest-si2qk]

The readings were not clear

[@AdmiralPreparedness]

Thank you for troubleshooting down to the component level on this fault. Now I am off to order two spare mosfets just in case I run across this component failure in one of my three heaters in the future. .

[@ajw6715]

What if they test way higher then 2?

[@ozgemmo3445]

Does your technique work for both N- and P-channel enhanced MOSFETS? Don't think you mentioned this in your video. cheers

[@MrSookonn]

Mosfets have G D S pins, but this specialist has L R and M pins.

[@m0011v]

i tested my mosfets the way you suggested to and it reads 0.794 so does this mean that they are bad?

[@electric_rider2044]

Hi. Does this work on EUC mosfets? I mean can i do same test?

[@williams6550]

I bought an older Aims pure sine wave inverter that powers on to a red fault led and outputs nothing- I can go in and check the mosfets this way while they're soldered on the board? I would just check each one like you did here?

[@rafaelmt1000]

Hello, I have a 15k power jack, all the mosfets had been damaged, I bought them all and also installed ALL the boards, again the mosfets on the positive side burned, I don't know the reason, my question is: those mosfets are installed in a specific order? is that I saw a different solder on some of them below, like a joint, or are they put anywhere? mine is 24v 6 pcs. Excuse my English, I'm from Puerto Rico.

[@leegenix]

Wow..After watching countless tutorials on Mosfet testing, your is the Only No Nonsense, and practical guide. I just now tested my scooter motor speed controller and 9 out of 15 failed Mosfets, Failed. Time to desolder and replace them with genuine IRF3205 parts instead of the failed NEC85H21s made in China. That's a lot of Mosfets to fail at the same time.

[@MrJessejamesharris]

Simple clear instructions, great video

[@hicoteo]

Thanks. This helped me fix my inverter.

[@ronaldpickett5133]

Very helpful.Thanks.

[@larry9210]

This is a very great and easy to understand video. Now I am going out to the garage and test the MOSFETs

[@glenchoitz9497]

In one of your other videos you mention PJ is going to a larger mosfet in the future. Can you let us know when those will be available as replacement parts, if they would be compatible, versus what is being used now? As my 10K unit will be powering half of my house I will be buying service parts to put on the shelf for a 'just in case' scenario and would rather purchase the larger mosfet sets and replace all of them at one time. Thanks! appreciate all of your vids....

[@trevorjames5493]

Okay the end of your video pretty much answered my question thanks Haha guess I shouldn't ask questions until the videos over but I just didn't want to forget the question so I paused it to ask cheers

[@tjhouston4916]

Hello Sean

[@kayusworld]

Thank you so much you really save me of plenty work

[@brendonpearce14]

Can the same test be applied to a car audio amplifier? My car audio amplifier is a MOSFET amp, and I'm having a lot of problems with it but I don't see any blown caps..