Leaking Jado lavatory faucet

kohler bancroft is the sink manufacturer, not the faucet mfgr. do you have a clue what faucet mfgr it might be?

Hot water side of most faucets give most problems try heating with hairdryer pryor to trying to remove,contact moen tell them of your situation they will more than likely send you a new cartridge free of charge if you raise enough stink about just replacing cartridge.

Check outside water pressure to house. Should be 65 - 75 PSI. If good most likely the cartridge. Older faucet, do both sides to prevent future problems. Blade handles? Make sure you get Hot & Cold stems, they turn the opposite way with blade handles. Some cartridges are universal and can be adjusted to work either way. After removing the stem, check with a flashlight in the valve, delta has rubber seats and springs on many of their models. If so, replacement of the rubber seats may do the trick.

Many of these problems develop from poor maintenance on water heaters and high pressure. Water heaters, regulators, safety valves, supply lines, and emergency shut off valves at fixtures should be checked, cleaned and adjusted on an annual basis. Your local expert plumbing contractor should be able to assist you on that.

more than likely hot side that is leaking as hot water tends to soften washer...try shutting off hot water angle stop under faucet...if drip stops it the hot water.. try pulling handle off and tightning nut that hold stem in place..

what valve do you have. most likely you will need to replace the cartridges

1- Hanldle may have a cap that will come off to access screw to loosen or allen screw on the handle to remove it.
First thing you can check remove handle and make sure the nut that holds stem down is not loose. You can tighten it and try this first just replace handle turn on and check for leaks.

If not please go to step 2 in removal of stem

2- Cut water off and remove handle to gain access to stem. Next remove stem by untighting nut at the base. Remove stem and replace o rings on stem about middle of it. That will stop water from leaking at the base.

Turn the water off at the shut under the sink and open both faucets to drain line. Remove faucet handle and stem and look inside. There's probably something jamming the stem from turning. Remove that and reassemble.

replace valve gasket at end of part

Pry the hot/cold button off the top of the handle. Make sure the water is turned off below the sink.

Under the button should be screws. Remove the screws. Pry the handle off. Remove the stems by lifting then out.

That should give you access to the washers you need to change.