You mention having the trim cranked, but I just want to verify that you've dialed the trimpot in according to the instructions, because "cranked" is most likely not the right place for it to end up.
Have you done this step?
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If you don't get any sound at first, don't worry. You will need probably need to adjust the trimpot. If your trimpot isn't already set at the middle of its rotation, do so. This may or may not be the optimal setting for the trimpot, but it should definitely produce sound and be a good starting point for fine tuning.
You should adjust the trimpot to the position where you get the least amount of distortion when playing your guitar and where you get the longest smoothest decay. This may take a few minutes and several adjustments. You should still get a very small amount of pleasing distortion. It's just the nature of the circuit. It is not perfectly clean, but the distortion does give it some warmth and is part of the pedals character. If you have an 18v adapter, we recommend using it while adjusting your trimpot. It makes the trimpot much more sensitive and easier to dial in. 18v will also increase headroom and reduce distortion.