Water Switch Runs Continually - Bosch SHEM63W55N Repair Manual
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Also See for SHEM63W55N:
- Installation instructions manual (88 pages) ,
- Operating instructions manual (88 pages) ,
- Quick start and safety manual (7 pages)
Table of Contents
Fault Diagnosis
Fault
Power module or heat pump issues
Customer issues
Water switch runs continually
2020-04-24_58300000218396_ara_en_c
Possible cause
Faulty heater circuit
¡
Open - circuited
¡
Far right LED flashes and
E:09
shows on display
Heat pump detects low water level
E:08
error code won't show during wash cycle
Incoming water too hot
¡
> 75 ºC / 167 ºF
¡
E:13
error code won't show during wash cycle
Faulty water switch relay
¡
Far right LED flashes
¡
E:05
shows on display
¡
Dishwasher will drain
¡
Wash cycle will finish
Faulty water switch harness
E:26
error code won't show during wash cycle
Copyright by BSH Hausgeräte GmbH
Troubleshooting
1. Check continuity between heat pump heating element and power
module. If harness is faulty, replace it.
2. Measure heat pump heating element resistance.
1. If resistance is ~ 9.3 Ω at room temperature, replace power mod-
ule.
2. If resistance isn't ~ 9.3 Ω at room temperature, replace heat
pump.
Heat pump measures water flow and generates an error code.
1. Run test program to check error codes for an
2. Check water supply and repair any leaks.
3. Check for kinks in inlet hoses.
4. Turn over pots / bowls collecting water.
5. Check continuity between water inlet valve and power module.
1. If wire harness is faulty, replace it.
2. If wire harness is OK, check water inlet valve and power module
as follows:
Measure voltage across water inlet valve terminals during
step 1 of customer service test program.
–
If voltage is ~ 120 VAC, replace water inlet valve.
–
If voltage isn't ~ 120 VAC, replace power module.
1. Run test program to check error codes for an
2. Make sure water inlet temperature is < 75 ºC / 167 ºF.
Replace power module.
▶
1. Run test program to check error codes for an
2. Check wire harness.
1. Check continuity of harness between water switch and power
module.
2. If wire harness is faulty, replace it.
E:08
error code.
E:13
error code.
E:26
error code.
Page 52 of 126
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