Grohe kitchen faucets are made to last, but they wear out after use like any other appliance or tool in your home. So, after years of use it makes sense to repair them using Grohe replacement parts. The most common problems are leaking from the handle and issues with adjusting the temperature. Making a quick, half hour long, repair fixes both of these problems and helps to extend your appliance's life for another few years.
Turn the water off by closing both valves under the sink.
Take off the Grohe faucet handle by finding the set screw and removing it with an Allen wrench. This screw is normally located on the side of the handle.
Take off the cartridge cover located underneath the handle. This is a dome-shaped part and it unscrews or slides off fairly easily. Remove the adaptor by unscrewing it from the top of the cartridge with an Allen wrench. Complete this only if your faucet has an adaptor; if not, just go on.
Unscrew the two cartridge screws in the top of the cartridge with the Allen wrench. Pull the cartridge out of the body of the faucet. Replace it with a new faucet cartridge and insert and tighten the cartridge screws to secure it in place.
Install the handle adaptor if your faucet has one and then place the cover on the faucet. Insert the handle into the slot and tighten the screw to hold this in place.