Common problems with Moen shower valves typically include handle stiffness, water leaks from the spout or handle, and unexpected water temperature fluctuations. In hard water regions, calcium and mineral deposits frequently accumulate inside the valve body, cementing the internal cartridge in place and making routine maintenance difficult. Additionally, worn O-ring seals can cause annoying drips, while debris clogging the pressure-balancing spool can prevent proper hot and cold water mixing.
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