Vevor 30L Ultrasonic cleaner went up in smoke - take tranducer out of series?

[jeremybh1]

Hi everyone.

Late 2022 I bought https://www.vevor.com.au/ultrasonic-cleaner-c_11064/vevor-digital-ultrasonic-cleaner-30l-jewelry-cleaning-machine-w-heater-time-p_010203073236
 the "Vevor 30L Ultrasonic Cleaning Machine" to support my hobby repair business.  I typically deal with vintage computer motherboards with leaked electrolyte and have used the machine to good success, I'd estimate 20 mins use every 3 months. 

Last week I turned it on to deep clean a power supply, came back approx 6 mins later only to find the room filled with smoke.  I turned off the power (front LEDs were still on) and ran downstairs to get a mask and fire extinguisher.  I was able to open up ventilation and figured no flame so take a video quickly for warranty, again back downstairs to grab phone as follows: https://youtube.com/shorts/9IrnURjq_7U

I assumed a major short had occoured with ?caps exploding but no fuse blown.   It go so hot that the outside metal chassis discoloured and sticker melted. Anyway got it outside, had a shower later etc. 

Wrote to Vevor immediately, whom are polite but explain it's out of warranty and are arranging a modest compensation.  It's been 10 days and they don't want it back nor has the partial refund come through so I figured let's open it.

During my inspection, I discovered: https://youtu.be/jJbZYxYkpgI?si=6pwDqwgs-5alcAKo

The fan never engaged since ownership. I didn't even know there was a fan in the unit! 
The thermocouple probe was disconnected from the factory (!).
These defects could have potentially led to a fire or explosion of the oil.
The power supply modules appear intact, with no signs of blown capacitors or heat stress on mosfets etc. However, it seems that one of the ultrasonic transducers has malfunctioned, causing a significant oil leak somehow. 

I am wondering if I could desolder the one that looks to have spilled it's guts and still run the unit.  Your thoughts? 
It would be unacceptable to me to throw this huge thing into a skip.

[floobydust]

Many Vevor products, including ultrasonic cleaning machines are subject to several product safety recalls.

A Letter to VEVOR UK Customers, Recall Statement

Banned in the UK. "Corrective action: Import rejected at the border and destroyed."
https://www.gov.uk/product-safety-alerts-reports-recalls/product-safety-report-vevor-ultrasonic-cleaners-sold-via-ebay

https://www.electricalsafetyfirst.org.uk/product-recalls/brands/vevor/
https://www.ccpc.ie/consumers/product_recalls/product-safety-information-notice-on-vevor-ultrasonic-cleaners-th-60a-and-th-30a-sold-on-the-ebay-platform/
I think it's the grounding and fusing, wiring too for the current handling.

[thm_w]

You are sure the thermal probe didn't just pop out when you opened the case right?
You'd think it would not heat up if it detects and open probe, as would 99% of products. Or at least the display would show 99 or 00 or something.

What oil?