You didn’t change the largest caps? That’s what I’d try next

 

I didn't find at a resonable price, minimum order 10 pcs etc, but I soldered 2 100u/450V in paralel with those on the board (that have about 110uF on the meter) and no change. Same sound when I connect the peltier. I will search for 2 new 120u/200-250V
Thank you!

 

New capacitors 120u/250V - same situation. I will not buy any components It.s too much for a piece of cheap China board...

 

New capacitors 120u/250V - same situation. I will not buy any components It.s too much for a piece of cheap China board...

Knowing when to quit is a hard skill to learn. It's like walking away from a half-done crossword or jigsaw puzzle.

My mother-in-law once gave me a jigsaw puzzle that was a picture of a pile of pretzels. The puzzle was round with no flat edges or corners. I hated to give up but I did. I was spending so much time on it and finally asked myself, "Why?!"

 

Hi from Brazil
Do you tryed to measure fast diodes?

 

Hello, Does anyone have experience dealing with EL error codes on Wine Enthusiast coolers? I have checked all the Schottky, caps & diodes and they are all good. The PCB model number is CD-110 B, PCB 80830K2

The unit has a dual-zone controller. The bottom works fine.

I noticed when I power up the unit the heat sink fan ran for a couple of seconds before stopping completely.

 

Yes, It must be just buggy firmware issue in certain commercial products where the service or repair bug is implemented intentionally. I have encountered such products earlier, many. The stop working in random faulty ways usually after warranty period expires.