AHS return trip to replace parts provided by the manufacturer. Cartridge, handle, bonnet nut and plastic cover piece. Plastic cover piece will need broken off as it is not budging without damaging. Customer will call once parts arrive. Customer States: Parts arrived from manufacturer and needs them installed. Technician Notes: Out today to installed manufacturer supplied parts on the Pfister single handle kitchen faucet. Resolution: Installed new cartridge, handle, and trim. Restored water to faucet and tested for proper function and leaks. Customer will monitor over the next couple weeks to make sure issue is handled.