Patent ID: 6265699
Filing Date: 2001-07-24
Classification: A47J,F24H,H05B

Abstract:
An electric water heater comprising:a water container;a first element located to heat water in said water container;at least one first element sensor located to sense temperature proximate to said first element;a controller connected to said first element and said at least one first element sensor, said controller monitoring said sensed temperature of said first sensor at termination of a defined time interval and comparing said sensed temperature against a predetermined temperature, said controller further identifying said first element as defective when said sensed temperature is less than said predetermined temperature;a second element located above said first element and positioned to heat said water; andat least one second element sensor located to sense temperature proximate to said second element, said second element and said second sensor being connected to said controller, said controller monitoring said sensed temperature of said second sensor at termination of a defined time interval following energizing of said second element and comparing said sensed temperature of said second sensor against said predetermined temperature, said controller further identifying said second element as defective when said sensed temperature of said second sensor is less than said predetermined temperature.