Not enough hot water in the shower even if I turn the handle all

Could be a chunk of scale in the valve. Need to turn off water supply and take valve apart. If nothing is found, turn water supply on to give line a 'quick' flush and turn back off. If this does not help, you probably have an obstruction somewhere in the hot supply line and a plumber may be needed unless you are handy. Good luck.

see here for parts. also avalible at ace hardware https://www.americanstandard-us.com/parts-support/parts/faucet-parts/bath-shower-faucet-parts?page=1&plimit=21

Check the water supply lines to the shower at the faucet handles. If the fitting for the hot water line connected to the handle is loose, it can twist and kink off the water supply further down the line when you turn the faucet handle. I'm not exactly sure how this could be relevant otherwise, but under normal design circumstances this type of scenario with your shower wouldn't matter for other faucets.

Their is a mixer valve if it is a one handle unit which is built in. It may be one half turn out of timing.

Uue a 1/8" allen wrench to remove handle to access the dial that set's the mixture of water.Remember or mark where it is and remove and reinsert counter clockwise about a 1/4 turn to start to you reach desired temperature setting. Be careful not to set it at a hot enough setting to burn you.
Once dial in place slide handle on and turn on to check water temperature.

Remove the handle,and all the trim rings,and the cartridge cover. take a flat head screwdriver and use it to lift
up the red ring behind everything, this is the hot limit safety stop,
this just stops the handle from turning to full hot.

Once you have the red ring lifted up, notice the numbers and the pointer
on the ring, numbers are on the fixture,

O= hottest 7=cold

See what the ring pointer is set to now, and move it half, before you put this back together, just set the handle on the unit and run the water to see if its to hot or not enough. Once you have found what is the best setting, then replace all covers and trim, handle.

Hello, first if any water supply hot or cold is turned off, you will experience trickling as you mention. You must have both cold and hot in order to adjust the temperature on your valve. if you had a plumber intall this unit you should ask him to adjust it. Otherwise here is how:
Rotate the handle counterclockwise to stop and let water run till cold water is purged, check
temperature. Rotate handle to off, remove handle parts (see Disassembly in your manual) and temperature limit stop, rotate clockwise to decrease and counterclockwise to increase maximum hot water temperature, reinstall temperature limit stop and handle (TIP: Do not screw handle in until desired maximum temperature is achieved) Repeat steps until desired maximum
temperature is achieved

turn off main water in home . turn on tap some where in home to release presser take shower handle off (screw under cap) unscrew the tap with a wrench unscrew on insides you pull out replace washer put all back togethere

There is a handle limit stop under the handle. Remove the handle with an allen wrench and you should see a plastic piece with a tab on it fit into the assembly. Remove it and rotate it slightly to allow more travel in the handle and reinsert. You will have to test it to see if it allows enough hot water to mix in. If it is still not warm enough repeat as needed. Once you have the water at a comfortable temperature reinstall the handle and enjoy.

When you installed the new tub faucet you probably turned off the water to that faucet of even the whole house. IF IT IS AN OLDER HOUSE, TURNING THE WATER OFF AND BACK ON CAN LOOSEN SOME DEBRIS IN THE WATER LINES THAT CAN FIND THEIR WAY TO YOUR NEW FAUCET. If there is a screen at the end of the water outlet it can be clogged with gunk. Uncrew the screen on the water outlet and clean. You may also want to flush out the hot and cold outlets by turning the water off, removing the cartigages and slowly let water flush them out. Then reassemble. Also when you have the tub handles out you can turn the hot and cold supply valves off and on a few times to loosen more debris if it exsists........Joe