Troubleshooting and Repairing American Standard Single Handle Kitchen Faucets is no different from any other kitchen faucet. You have to inspect the faucet and determine which portions of the faucet are leaking and or, not working properly.
Once you know what is wrong with your American Standard Kitchen Faucet you can then replace the parts that are leaking and not working properly. Going to the American Standard website and downloading the parts diagram for your faucet is always a good idea so you can see how the parts are put together and find the part numbers of all the parts you will need.
With American Standard Kitchen Faucets they use a cartridge to control the water flow and any problems with dripping or, not shutting off is surely the cartridge needing replacement. I like to remove the handle by loosening the setscrew that is accessed through a hole in the rear of the faucet. The handle will then slide off and the cap below the handle can then be removed. This will allow a visual inspection of the cartridge for leakage and you can operate the cartridge with your fingers while checking operation. Any leakage from the cartridge or, not shutting off is an indicator the cartridge requires replacement there are no repairable parts in the cartridge. The cartridge is held in place by 3 screws and should be replaced with a matching cartridge.
Leaking from under the spout indicated the o-rings under the spout require replacement. No flow is usually an indicator of debris clogging the aerator but if the flow does not improve with the aerator removed and the faucet has a side sprayer check the side spray for water flow. If water flow is present at the side sprayer then the diverter is stuck and requires replacement. The diverter is located at the rear of the valve body and can be seen when the spout is pulled off.
As always when you consider that many American Standard Kitchen Faucets retail at home centers like Home Depot and Lowe’s for less than $80 you should always consider the price of the model you have before expending a lot of time and money on parts attempting to fix the faucet.