Kenmore 630.13952 Manual page 45

Fault Diagnostics
To check the heater, turn off the dishwasher, block up the tank and check the
resistance of each part of the heater as follows.
TIP: Current can be measured through the
heater (~ 9.5A). There can be more than one red wire, so check the wiring
diagram to select the heater wire.
NOTE: Open door to run test program.
Making NTC and Hi-
Limit measurements
Controls timing out and showing "1"
Occasionally dishwashers can run for hours, not finish washing & show a "1" in
the display.
heating problem -- all heating related parts must be checked until the problem is
found.
Heating system checklist if controls time out:
 Check control module heater relay & solder joints.
 Check wire harness & terminals (to control and heater). Controls have been
replaced when the problem was loose connections.
 Check heater resistance (~ 11).
 Check flow switch (~ 0.4). If flow switch is OK & water doesn't flow, check
circulation pump.
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Heater ~ 11 Ω
Hi-Limit ~ .3 Ω
Flow switch ~ .4Ω. A spring loaded plunger closes it when
water is flowing, so you must remove the microswitch from
the heater and close its contacts to measure the resistance.
This means the module has timed out due to an unidentified
red heater wire at the control or
Flow
switch