If the water heater inlet valve is broken, first shut off the power and water supply to the unit. Locate the valve near the bottom and inspect for visible damage or blockages. If the valve is clogged or leaking, replace it with a compatible model. Turn the water supply back on, then restore power and test the heater for proper operation. Contact a licensed plumber if the issue persists or if the valve is irreparable.

A broken inlet valve can lead to water leaks, energy waste, and potential damage to the heater or surrounding structures. According to the U.S. Environmental Protection Agency (EPA), a malfunctioning water heater can waste up to 20 gallons of water per hour, increasing utility bills and risking water damage. The average cost of water heater replacement due to valve failure is $1,000, with repair costs ranging from $200 to $500, as reported by HomeAdvisor. Over time, a faulty valve may cause the heater to overheat, pose a fire hazard, or reduce efficiency by up to 15%, according to Energy Star. Replacing the valve promptly prevents further complications and ensures safe, efficient operation. Additionally, improper handling of gas or electric heaters without professional assistance can result in dangerous gas leaks or electrical malfunctions, emphasizing the need for expert intervention when repairs exceed DIY capabilities.