Technician arrived and customer explained that her shower handle had been getting hard to turn, until today she could not turn it without fear of breaking the handle off in the wall. She also showed tech to the master bathroom and explained that her husband had looked at the shower body and it was a similar problem. Tech went over the options and explained that the most likely cause which due to the age of the cartridges. Customer authorize tech to install new moen cartridges. Tech shut the water off and installed two new Moen cartridges. Water was restored and tech confirmed that the handles were no longer tight and everything was functioning properly. Tech re-installed trim kit in master bathroom at customers request. Customer had asked tech about installing new trim kits she had purchased. Tech explained that the kits needed should be made by moen for a single handle shower.