Bathroom sink hot water tap, was running slow, & now has stopped working altogether.

Shut off valve under sink and remove speedy hose from valve. Put pot under valve and holding a cup over opening , turn on valve slowly. If water comes out you have blockage in hose or faucet.

If no water comes out, blockage is in valve.

Let us know which and we can help you clear it.

Chuck

Sounds like a blocked inlet port in the cartridge, Try this. Shut the water off and pull the cartridge, Check the inlet ports for trash and clean. Now place a pan over the open valve and turn the water back on for a minute to flush out the supply. You should have a strong stream when doing so. Reassemble and test. If that works do it on all affected taps, good luck, Tom