How to unlock a locked Weller WD1 - SOLVED! - Page 1
Forum section: electronics / testgear

author: mkinn
author_rank: Contributor
timestamp: October 07, 2025, 11:46:51 pm
content: I looked everywhere on the web for this, and had no luck. When I hold the up and down temp keys 4 seconds for special menu 2, it reads On. Then, I'm supposed to enter the 3 digit lock code. I can scroll up or down to select any number from 1 - 999, then I have to press the III third key to select that unlock code, and it would then unlock the station. A student entered a lock code while playing around with the menus, and doesn't recall what number he entered. I'm not a trained hypnotist, andthis unlock procedure is NOT in the user manual, so barring a lucky nighttime dream recollection, we're out one WD1.Update 10.8.25 - emailed Weller, they sent me 2 documents on how to do this! - Attached, an Unlock code guide pdf, and a WD - WR3M unlock procedure.doc file. You access special menu 1 mode by holding the up & down arrow buttons until you see -1-. release the two buttons, it will say On. Then, press the I key and it will display a nine digit code at the bottom of the display under the "On". You then have to look up that nine digit code in the 3 page UnlockCodeGuide.pdf file. The Lock Code will be in the left column. Press the up or down arrow buttons to display that same lock code and press the rightmost button to select that code, unlock the station, and exit the special menu. On my WD1, that is the III key. On a WD2, it's the 2 button. On a WR3M, it's the 3 button.

author: Andy Watson
author_rank: Super Contributor
timestamp: October 08, 2025, 12:02:07 am
content: Will a "Factory Reset" unlock it? Apparently this is on page 8 of the manual, however, my browser is playing-up at the moment and I can't download the manualThere has to be a method of making the units works when they are virgin.

author: mkinn
author_rank: Contributor
timestamp: October 08, 2025, 12:14:42 am
content: You CANNOT get to the FSE factory reset option without unlocking it 1st, so NO, that wouldn't work.

author: mkinn
author_rank: Contributor
timestamp: October 08, 2025, 12:28:13 am
content: I BRUTE FORCE tried EVERY code until I got to #51, and that was it in my case. But I think EVERY WD1 or WD2 owner would love to know, just in case their son, daughter, or a silly student unwittingly locked it and forgot the number. I read that you can do it through the software, but the WD1 and WD2 have NO USB board from the factory. You could at one time buy the USB board, Weller part # 0058758040, but I cannot find ANY mention of it other than the OI_WD1M_eng.pdf user manual exploded view on page 21. I read that the WD1M and WD2M both had USB (My WD2M does), but they were discontinued, then later Weller brought back the WD1 and WD2 as a cheaper offering without USB.

author: Simmed
author_rank: Frequent Contributor
timestamp: October 08, 2025, 12:34:58 am
content: ask the factory ?

author: Andy Watson
author_rank: Super Contributor
timestamp: October 08, 2025, 12:53:26 am
content: Look here:https://www.mikrocontroller.net/topic/388270I don't speak german, perhaps one of our german members can translate.I gather the gist of it is, hold-down a combination of buttons whilst you turn the power on.See next post. The unit will display a 9-digit number. Use that number to find the unlock code from this table:

author: Kean
author_rank: Unknown
timestamp: October 08, 2025, 01:58:03 am
content: Quote from: Andy Watson on October 08, 2025, 12:53:26 amI have never used the special functions menu on either my WD1 or WD2M stations, but I just tried the lock function on my WD2M.Once locked, if you try to enter the menus it will display "On" with the lock icon and you will need to use the unlock code using the UP/DOWN buttons. So as mentioned above, you cannot access the factory reset option. At this point with "On" and lock icon displayed if you press the left mode button, it will display a 9 digit code in the temperature value displays.I was going to suggest brute force, or using another station to go through the sequence and document some of the values - hoping that the most likely solution with be in the range 1-50 or 950-999. But with this PDF you can just look it up.

author: mkinn
author_rank: Contributor
timestamp: October 09, 2025, 04:19:43 am
content: I don't know if this should be pinned in a special place for topics like this or not, but I bet there's going to be MANY searches on Google for this info, and I hope it brings them here!