If this is a new install or the shower was recently repaired and the water temperature range is restricted. In the off position, you are able to turn the handle both clockwise and counterclockwise.
The handle (this symptom happen more often with knob handles) is installed upside down. Remove the handle and rotate 180 degrees.
For additional information on Moen products visit solutions.moen.com and select the type of faucet you are repairing. The faucet guide will contain repair details, troubleshooting and specific information on assembling handles associated with that style of product.
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