Fan short circuit, how to fix?

carfnann

Hi

I was changing my heatsink fan and did a short circuit on the wire (with a nice spark)...
Board seems ok, I can Home All, launch heating on Tool and Bed but I have no fan working now...
I have 2 fan on Always On and 2 on Pwm fan.

What can I do to fix my fan? is there a fuse to change?

Thanks

jay_s_uk

What board are you using?

carfnann

oops sorry, I'm using a Duet 2 WiFi

chrishamm

If you have a v1.03 or newer, I think you have to replace a fuse. See https://duet3d.dozuki.com/Wiki/Duet_Wiring_Diagrams There is a blade fuse in the middle for the fans.

carfnann

Thanks!

Indeed, I've found the fuse. it is broken...
unfortunately it is not a common fuse... I've check in auto store and the mini fuse start at 3A

I would have to order online and wait weeks

A Former User

@carfnann said in Fan short circuit, how to fix?:

I've check in auto store and the mini fuse start at 3A

while its probably not supported both the fan mosfet and the traces* on the board can deal with 3A, so in theory the the fuse (or the fan wiring) should fail before the board if you were to use a 3A fuse while you wait, and a fault develops. On the other hand odds are the mosfet for the fan in question is also blown, so I'd probably use a 3A just to test even if not for prints.

*) according to https://www.4pcb.com/trace-width-calculator.html

edit: if you find somewhere that fix motorcycles, they might have 1A fuse

en_passant

feeling @carfnann's pain as I'm trying to find the same fuse! Easy to finds 3A+ (even 2A on Amazon), but 1A not so.

@bearer said:

while its probably not supported both the fan mosfet and the traces* on the board can deal with 3A, so in theory the the fuse (or the fan wiring) should fail before the board if you were to use a 3A fuse while you wait, and a fault develops. On the other hand odds are the mosfet for the fan in question is also blown, so I'd probably use a 3A just to test even if not for prints.

Hoping mine will just be the fuse and not the mosfet as I wasn't playing with it and short it (what's more, since I've had the Duet wifi... it's never had a fan plugged into it! )
Where about is that guy out of interest?

e_p

A Former User

@en_passant said in Fan short circuit, how to fix?:

I wasn't playing with it and short it

if the short circuit curren't didn't pass through the mosfet then its probably okay, the other way around the mosfet usally fail before the fuse.

sharing OPs general location might be a good idea, myself and others may also have a fuse to spare nearby.

en_passant

@bearer said in Fan short circuit, how to fix?:

@en_passant said in Fan short circuit, how to fix?:

I wasn't playing with it and short it

if the short circuit curren't didn't pass through the mosfet then its probably okay, the other way around the mosfet usally fail before the fuse.

sharing OPs general location might be a good idea, myself and others may also have a fuse to spare nearby.

If you should happen to find another, I know someone in London who'd be grateful!

e_p

Karma

@en_passant That very weird, I was able to easily find a 1amp mini fuse on Amazon. I pretty much did the same thing as OP. Got a very nice spark. I was so freaked out that I may have fried my board or something. Then I Googled it and found out about the fuse. Checked it and sure enough, it was blown. Ordered new fuse, only could get it with 10 in a pack. lolz, I guess I have a few extra tries to see some sparks fly. J/K.

If you would like and it is not against the forum's rules, I could post you the link to what I bought to replace my fuse.

en_passant

@Karma

Please, yeah. (Not sure it's against forum rules, but don't think so...)

I've found 1 - but it's on eBay from China and going to take a month to arrive!

e_p

Karma

@en_passant Admins, please forgive me if I am breaking the rules by posting a link in your forum's. I am only doing this to help a fellow member out.

https://www.amazon.com/dp/B0721P1RNT/ref=cm_sw_r_em_apa_i_fx73EbT65D528

This is the type of fuse you will need. You can find them in lower quantities, but for $8.00 dollars, its not like they are that expensive.

en_passant

@Karma

Ahh, you're in the US. I did also find them - but I'm in the UK... which seems to have a distinct lack of 1A ATM mini blade fuses!

Might have to go with China....

e_p

Karma

@en_passant Hmm. Well that kinda stinks then. I will try and find it for you in the UK.

Karma

@en_passant Please try this link.

https://www.amazon.com/dp/B07N3YP4C1/ref=cm_sw_r_cp_awdb_t1_3J73EbWQ03GP8

It says they ship to UK and you can get it by this Friday

Phaedrux

Posting links is fine.

en_passant

@Karma

Thanks for the help! Appreciated!

e_p

Karma

@en_passant I am glad I was able to help soneone today. It makes the day worth living and enjoying.

dc42

You can find them in the UK here https://www.co-star.co.uk/3758/mini-blade-fuse-1amp-black-pack-of-10-fbm-1-10/.

They are usually available from UK eBay suppliers too, but they seem to be out of stock of the 1A version at present.

en_passant

@dc42

Google didn't seem to pick them up for me but I've just picked them up now, thanks.

e_p