Fridges are notorious for tripping GFCIs. Something with the compressors. If it's an older fridge it gets worse. Some manufactures recommend not using GFCIs anyway. You really don't want to take a risk of the GFCI tripping and spoiling your food. I would do my best to explain this to the customer. You could even put a load splitter on the fridge and measure the hot and neutral at the same time with a clamp meter. If it gives you a reading then there's your proof to the leakage current tripping the GFCI. Put the meter on max/min and wait for the compressor or ice maker to kick on. You could also call the fridge manufacture and see what they say about GFCI protection and their product. Or replace the receptacle and when it trips explain it all over to him again.Canadian sparky said:I'm doing work at this house I've been working on all week..ran a new 15 amp home run for fridge ...fridge has been plugged in all week..no problems...home owner is now installing all new kitchen cabinets from ikea(don't ask)..anyway they plugged in to new 20 amp gfi rceptacles(home run nothing else on on circuit)and he's saying the gfi is tripping. I explained to him the operation of gfi's and how sensitive they are and he is adamant that there is something wrong with the receptacle...he is as stubborn as a mule..he owes me the last 20% .how do you guys handle something like this when you know you're right and the homeowner is an idiot???!