I have water (10 gal a day) leaking from my refrierator. All water is off and drained.
Where can it be coming from? Can it be from auto defrost?

YOur unit will not have 10 gal a day from defrost. Are you sure the water is shut off to icemaker and water dispenser, if you have one.There is no other place you could be getting water from in a refrigerator

Check your ice maker supply valve if you have turned it off and leaking is still occurring check that the valve is actually off. Sometimes a bad valve will continue to let water by even after its turned off. Also exactly where on the refrigerator is it leaking from?