TROUBLE SHOOTING CONTINUED:
Replace thermostat if contacts are open when knob is fully
clockwise and water temperature is less than 190º F. You will
measure 120 volts (approximately) to ground from both thermo-
stat terminals when it is ON and from only one terminal when it
is OFF.
In this water boiler there are two elements in parallel. Failure of
either will cause very slow heating. Perform the following tests:
a. Clamp-on ammeter test: If both elements are good, you
will measure about 21 amps at 240 volts, 24 amps at
208 volts or 29 amps at 120 volts. If you measure only 10
to 12 amps, check the current to each element to identify
the defective part.
b . Ohmmeter or continuity test: Disconnect all power by
unplugging unit. Disconnect one terminal to measure each
element. They should each have continuity or measure
about 20 ohms.
2 . Defective thermo-
stat
3 . Burned out heat-
ing element
SOLUTION
POSSIBLE CAUSE
PROBLEM:
WATER DOES NOT REACH PROPER TEMPERATURE
SOLUTION
POSSIBLE CAUSE
PROBLEM:
WATER OVERHEATS, ELEMENTS DO NOT SHUT OFF
Replace the thermostat. You can sometimes operate temporarily
by turning the thermostat knob to off until the boiling stops.
1 . Defective
thermostat
3
