How old is my Whirlpool water heater?

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Where to find the serial number

Look for “Serial No.” on the label above the gas valve

Dark = year, orange = month or week.

1104T403904

Week 4, 2011 (around January).

0128104380

Week 28, 2001 (around July).

Coverage and sources

These rules cover Whirlpool water heaters, not Whirlpool kitchen or laundry appliances.

References checked 2026-10-26.

Independent reference tool, unaffiliated with Whirlpool. Sources & method