Fridge temperature rises every two weeks after a gas refill
I have a commercial refrigerator in my restaurant, the fridge has no brand. It is a 4 door, stainless steel commercial fridge which runs at around 3 degrees.
For the past 6 months, the fridge has been warming up, it goes from the standard 3 degrees celsius to around 15-20 degrees celsius. When we call the technicians, they say that it could be a gas leak but they are never able to find a gas leak. They then refill the gas fully, but after 2-3 weeks, the same problem occurs and the fridge heats up again. 3 technicians have seen the fridge so far but no one can find a leak or any other problem. Quite strange.
Does anyone have any idea what could be going on? Could there be something with the compressor?