Wine Fridge Power Board

[budm]

Re: Wine Fridge Power Board

May be your Peltier module is bad?

[jkessler00]

Re: Wine Fridge Power Board

I have been messing with this on and off for a couple weeks now. I didn't mention every little step but I confirmed the fan was good when I noticed it wasn't running. I didn't have a quick failure on a new board. This unit has two boards and the other died (or so I thought) after replacing the first board. I replaced all caps, diodes, and transistors on the second board. I had the same issue so I decided $48 for a new board was better than the time I had already wasted to this point. I plugged the new board in and now it does the same darn thing; runs for about 5 minutes or so and the fan goes off. I hear a beeping coming for both boards; both of which are brand new. I can unplug the fridge, plug it back in, and it'll run again for a bit before the left side shuts down. The left is the only one that shuts down even though both beep. It's the most aggravating thing...
I'll try to record the current draw on both sides.

[Longbow]

Re: Wine Fridge Power Board

There was no power to the fan so I knew it wasn't the thermocoupler.

This assumption may not have been much help to you. No fan power doesn't eliminate a bad fan!

I purchased a new board before finding this site but I immediately replaced the caps on the new board with Nichicon.

Don't understand your logic. Why wouldn't you install the new board and re-evaluate?

Things were great for a few hours and then the other side died.

I am not a professional appliance repair guy, but a quick failure of the new board would definitely point to something outside of the control board. (i.e. the fan, or other external part.)

It powered right on and worked for about 15 minutes before the fan stopped. I can hear a high pitch beeping coming from the board but I can't tell where exactly.

Points to a faulty fan or other external part in my opinion. Most new appliances use brushless electronic motors. If you have the means, pull the fan and monitor the current while running it on the bench. Ditto on the cooling device. Probably draws too much current from the control board, heating up various parts. I would definitely get a service manual at this point. Let us know what you find.

[keeney123]

Re: Wine Fridge Power Board

Check to see if the 12 volt supply is not connected both to the fan and Peltiers with Ohm meter and unit unplugged. I think your power supply is being told to turn off. This could be with the thermocouples or the connectors from them to the power board could not be making good contact. Also the rheostats that adjust the setting could have bad connectors. You could see if the heat sink is getting hot when the fan is off. That would indicate a bad connector to the fan. Also, you could break one line going to the Peltier device and see if it pulls current when the fan is off. I believe you will find that the fans and Peltiers are connected directly to each other, at least the external fans.

[jkessler00]

Re: Wine Fridge Power Board

I'll probably have to pull this back out for better pics...not sure if you can tell anything; or if there is anything to even tell.

[jkessler00]

Re: Wine Fridge Power Board

No, I replaced every single cap. I'll get a pic later.

[budm]

Re: Wine Fridge Power Board

So you replaced ALL the caps except the large main filter cap? Pictures?

[jkessler00]

I found a couple helpful articles on here from people having the same problem as myself. I have the dual zone Wine Enthusiast 12-bottle fridge that lost cooling on one side. There was no power to the fan so I knew it wasn't the thermocoupler. I purchased a new board before finding this site but I immediately replaced the caps on the new board with Nichicon. Things were great for a few hours and then the other side died. Instead of another new board, I bought all new caps, diodes, and transistors to try and fix this myself. It powered right on and worked for about 15 minutes before the fan stopped. I can hear a high pitch beeping coming from the board but I can't tell where exactly. It is not outputting power. If I unplug it and wait a bit and then plug it back in, it works for a few minutes before stopping again with the beeping. Does this ring any bells?