Experiencing lukewarm water rather than properly hot water is usually caused by heavy mineral sediment accumulation, a failing heating element, or incorrect thermostat settings. Over time, calcium and lime scale build up at the bottom of the tank, creating a thick insulating barrier that blocks burners or lower electric elements from transferring heat effectively to the water. Additionally, on electric units, a lower heating element may have burned out, leaving only the upper element to provide partial heating. Verification: Flush the tank to remove sediment and check thermostat temperature settings.
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