That should be a very good solution, however these refrigerators may cost very little. It should be a very big issue for my customer if he has to change the plumbing, as it implies lots of extra work on each machine. At this moment the only thing he has to change are the thermostat (remove), add the electronics and do some wiring.

I did a few tests with restarting the compressor when it had just stopped 2 seconds (thus not equalising the pressures) and that does really work well. Test is running now for about 15 hours, switching on/off every minute and I haven't seen a problem yet.

So I am able to restart it, but are there anymore downsides doing this?