I need you guys help to find a leak.

Disclaimer English is my second language.

So tomorrow i'm going back to a grocceriesstore freezer to find this leak i was suppose to find on Friday.

Went there on Friday. used my electronic leakfinder and pinpointed a leak in a freezer. it's quite big. and it's two section connected together. 6 fans cooling down the 2 sections below the back of the freezer.

They emptied the freezers for me so i could continue searching for the leak. I removed all the covers and metal sheets. I put my leakfinder in low mode and noticed it was on the right hand side i got the most "Beeps"

Here is the problem. on both sections i search with my electronic leakfinder and leakfinding spray and i couldn't find the damn leak. i searched constantly for 5 hours straight checking even under the evaporators tubing with a handheld mirror and i even thought i spotted the leak but nope it was a false alarm.

I'm not allowed to put ultraviolet fluid in the system. and i'm going back there tomorrow. The refrigerant gas is building up a layer at the bottom of the freezer so it's really difficult to pinpoint with the electronic leakfinder.

Here is my question. What should i do? i must find this leak and i feel like my methods aren't working.

Thanks in advance. i'm a fair beginner only working with refrigeration for 3+ years.

Edit: There are no valves to this freezer. so i can't just close off this freezer. i have close down 3 freezers with 4 sections each.

submitted by /u/Hogzor
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