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SERVICE PROCEDURE RE-II
Heating Element Testing
Step 1. TURN OFF POWER TO WATER HEATER.
Step 2. Remove access cover(s) from front of water
heater. Remove insulation and plastic cover
f
rom thermostat.
Step 3. Disconnect wires from heating element.
Step 4. Set multi-meter to “ohms” setting.
Step 5. Touch probes of multi-meter to screw
terminals of heating element
(see illustration 4).
Step 6. Reading should be 12.8 ohms (±6%) for a 240
volt, 4500 watt element:
A reading outside the range using the formula
above (±6%), indicates a bad element and the
element must be replaced.
Testing For Open Or Burned Out Element.
WARNING
High voltage exposure. Be sure power is turned
OFF to water heater prior to performing this
procedure.
Testing For Heating Element Short Circuit To
Ground.
Step 1. TURN OFF POWER TO WATER HEATER.
Step 2. Remove access cover(s) from front of water
heater. Remove insulation and plastic cover
from thermostat.
Step 3. Disconnect wires from heating element.
Step 4. Set multi-meter to “ohms” setting.
Step 5. Touch one probe of multi-meter to either screw
terminal of heating element and the other on
the element flange (see illustration 5). There
should be no reading on the ohm meter. Any
reading indicates a grounded element and the
element must be replaced. Repeat this step for
the other screw terminal.
Ohms = Volts
2
Watts
Element Screw Terminals
Meter Probe
Element Screw Terminal
Element Flange
M
eter Probe
Illustration 4
Illustration 5
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