My quest bathroom shower does not get hot water... the faucets get hot water.. what could be the reason?

Hi Ceremmel

The hot inlet ports to the shower cartridge are probably plugged. Here, you can try to pull the cartridge out and clean it in CLR (calcium, lime, rust remover), or pull the cartridge and purchase a new one... should resolve the issue for you.

While the cartridge is out, pulse the water on for a few seconds to clear any sediment/debris from the lines.

Good luck!

Mark