RESIDENTIAL GAS AND ELECTRIC WATER HEATER
SERVICE HANDBOOK
Residential Electric – continued
Element Test
OHMS Resistance Check**
Test Conditions:
Element(s) not heating or water becoming excessively hot. This test uses the multimeter's battery as the electrical supply.
Procedure:
Power to the water heater is "OFF".
Multimeter set to OHMS scale testing.
Black lead "Common" port.
Red lead in "Ω" or " OHMS" port.
Dial indicator set to scale above expected indication.
Note: Volts divided by amps = OHMS
Element
Disconnect wires from the element terminals.
See OHMS Resistance Table – Page 45
Test probe on each terminal of an element
If … | … then | |
proper resistance (+7.5%) is present | continue testing. | |
meter reads “0” | • | check OHM scale setting |
| • | replace element. |
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meter reads “1” or off scale | replace element. | |
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** The above test can also be conducted with the element removed from the tank.
A.O. Smith Water Products Company | 40 | Training Department | |
©2002 | Ashland City, Tennessee | ||
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