HOT AND COLD REVERSED MOEN & ONE HANDLE TUB

This is a very simple fix. NOTE: This is for a Posi-temp model only!! First turn off the house water. Relieve the water pressure at a nearby sink. Then remove the handle from the faucet. Remove the black plastic piece, then the two white plastic pieces (these control how hot the water gets by controlling how far the handle turns), then the metal cover over the center piece of the valve. Once these are out of the way, there is a small metal clip that you can see that holds the cartridge in place sitting in a **** on the top of the center piece. Remove this carefully with a small straight edge screwdriver, taking care not to lose it. Then with a small pair of pliers, pulling on the center of the cartridge, pull straight out. Once the cartridge is completely out, turn it counter clock wise, 180 degrees and then reverse the process. The hot/cold will be in proper location now.
Now for an older style, simply take the handle off, turn the center portion of the cartridge 180 degrees counter clock wise and return the handle. Hot/cold will now be in their proper locations.
Good luck.