Thread: Ice Maker fill problems

Model Number: KSRS27QAWH07

Brand: KitchenAid

I've replaced my ice maker module approx. 3 months ago due to a broken tooth on the synchronous motor gear.
It has been working fine until recently due to water supply problems occurring from my reverse osmosis filter.
I have the water supply line routed from under the kitchen sink's R.O. filter to the fridge through the walls. It is about 15' feet of 1/4" poly line. It reduces the flow and pressure from the source, somewhat, because of it's small diameter. The actual source pressure is not normal household water pressure to begin with because of the operational pressures of the R.O. unit. The filter's product water holding-tank supplies water to both the sink's water faucet and the fridge.
I've noticed that the ice maker tray only fills about half way. Only 4 cubes of the tray's 8 cubes are produced.
I've read here and on other forums that the line pressure should be at least 20#. I doubt that I'm at the pressure at the ice maker.
Is there any way to lengthen the fill time for the ice maker?
I had noticed that there is a small nylon adjustment screw on the right side of the ice maker module. What is this adjustment screw for? I've re-adjusted it several times hoping that it had some effect on fill time but hadn't noticed any difference in operation.
Thanks in advance for any information you may shed on this.