If pressing the reset button doesn’t resolve the issue, try power cycling your Whirlpool refrigerator. Turn off the refrigerator by unplugging it from the mains, or by switching off the circuit breaker that supplies power to the appliance. Leave it powered off for a few minutes, then plug it back in (…or switch the circuit breaker back on). Power cycling can sometimes reset the appliance and resolve minor glitches….including the water filter light issue.