How to Repair a Shower Faucet

If the water tap of the shower goes from cold to hot, there is a problem with scald guard. Turning the handle in one direction increases the water temperature and vice versa. If the handle is misaligned, the scalding guard inside the faucet will also misalign. This means rapid changes in temperature due to too cold or hot water coming out. One way to counteract this problem is to adjust the blanking guard of the handle. This will level the water temperature and avoid the problem of sudden hot water changes to cold water.


  1. Remove the handle from the faucet by unscrewing the small round set screw on the base of the faucet. Insert an Allen wrench into the screw head and turn it counterclockwise to unscrew it. Pull the handle back to remove it from the faucet.
  2. Find the scalding guard of the handle under it. It is a plastic guard that limits the rotation of the same, while limiting the amount of hot water coming out of the faucet. In some, this guard is easily found because it has a dial. In other faucets, it is a small plastic lid.
  3. Turn the guard to limit or increase the amount of hot water coming out of the faucet. If the guard is damaged, turn off the house water supply. Unscrew the cover nut and remove the cartridge. Replace it with a new cartridge and adjust the blanking guard.
  4. Test the faucet when you open the water supply again. Adjust the scalding guard as necessary until the water temperature matches your needs.