HOW TO REPLACE WATER-VALVE - BOSCH DISHWASHER

BOSCH – SIEMENS – GAGGENAU – THERMADOR -  DISHWASHERS - WATER-VALVE REPLACEMENT.

 

Dishwashers are rated 120V, 60 Hz, 15A, 1450W (max.). Maximum amp draw when heaters running ~ 11A.

TO ACCESS THE WATER-VALVE

> Remove two (2) T-20 Torx screws from toe kick and tilt toe kick out from under dishwasher.
> Remove base insulation (on models with insulation).
> Move sump inlet hose away from water valve (without disconnecting it).
> Disconnect wires from water valve, including ground wire.
> Remove two (2) T-20 Torxscrews from water valve.
> Pull valve out from dishwasher and disconnect water hose from rear of valve. Remove any water from sump & base.

HINTS

Water connection 3/8” NPT female.  Inlet water pressure range 5 - 120 psi (0.3 – 8.27 bars).

Water valves have been upgraded several times since 1st 1/4 of 1999. 

* 607335“Rast 5” time-fill water valve (UC/43 & above dw’s) has a keyed terminal connector and can’t replace 425458 or189533 valves. It replaces all “Rast 5” time-fill or pressure-fill valves.

* Time-fill valve #425458(UC/42 & below) also replaces pressure-fill valve #
189533. It looks like pressure-fill valve #189533, but isn’t the same. Pressure-fill valves can’t replace time-fill valves.

* Pressure-fill valve (part #189533) has a horizontally mounted solenoid and water fitting held in place by the metal mounting bracket. It replaced older pressure-fill valves (580009&167081) until time-fill valve425458was used.

When reconnecting the water supply to the water valve, don’t over tighten the elbow fitting. On valves with vertical solenoids, the plastic can crack and cause leaking if excessive force is used. • Using Teflon tape on water fittings can help prevent leaking. • The water valve can be accessed without removing outer door or base cover. However, removing them will provide easier access.

BOSCH - SIEMENS DISHWASHERs - ERROR CODES – HEATER AND NTC REPLACEMENT

BOSCH - SIEMENS DISHWASHERs - ERROR CODES – HEATER AND NTC REPLACEMENT

Gaggenau_Siemens_Theremador & Bosch dishwashers_ how to replace Heater & NTC _ Error codes.

ERROR CODES

P(X) Program codes

P0 = Functional test - used for assembly

P1 = Customer service test program

P3 = Endurance/Life test

P4 = Control coding (see “C(X)” control codes below)
E(X) Error codes

E0 = No errors

E1 = Heating error

E2 = NTC error

E3 = Filling error

E4 = Water switch cannot be positioned

E5 = Safety level reached E6 = Aqua sensor error
C(X) Control Codes

Codes C1 to C9 possible, depending on DW model.

{Pushing Cancel-Drainer Cancel-Reset buttons while dw’s are off can see codes, leading to service calls.}

ERROR CODE-1

  Occasionally dishwashers can run for hours, not finish washing & show a “1” in the display. This means the module has timed out due to an unidentified heating problem --all heating related parts must be checked until the problem is found.

[Modules have been replaced when problem was loose connections. Before replacing modules, check connections first.  Whenever a “1” shows in the module display, the module must be reset (after the heating problem has been fixed) by running the dishwasher. The module resets after the 1st run.  Check module heater relays, wire harnesses / terminals & heaters before checking NTC’s, flow switches & high limits.]

HEATER OPERATION

  Flow through heater heats water without an exposed tank element. Filtered water enters the heater from the circulation pump. The heater heats water when the flow switch signals water is present.

  The sump also contains an aqua sensor, drain pump, NTC, Hi-limit and back-flow valve. The aqua sensor senses water cleanliness – dishwashers add rinses if needed. The NTC senses water temperature. The Hi-limit shuts off the heater if the water gets too hot. The back-flow valve prevents waste water from entering the dishwasher.

HEATER & NTC DIS-ASSEMBLY

·         The heater & NTC can be accessed or measured from the right side of the dishwasher, but can only be removed by dropping the entire base (by flipping the dishwasher on its back) since they are wedged underneath the tank.

> Remove outer door. {See the previous post here; to get details about door removal}
> Remove toe kick
> Remove right/left side panels.
> Raise right side of tank. 

[The fascia panel and door don’t need to be removed to access the heater & NTC. However, the door must be removed to completely remove the tank.  Remove all water from the sump and hoses before accessing the heater -- when the dishwasher is flipped on its back, water can enter the water fill assembly diaphragm and cause the dishwasher to not fill properly.]

TO SEPARATE THE BASE FROM THE TANK

* Lay dishwasher on its back.
* Pull door springs out from base.

* Remove terminal blocks from base (for two-piece harnesses).
* Disconnect hose from water valve (or remove water valve from base if easier).
* Disconnect J-box ground wire, then pull wires out of J-box.
* Pull out inlet hose from sump.
* Carefully pull base away from tank and sump.

{Remove water from sump and hoses before laying dishwasher on its back (to avoid water entering water fill assembly & causing faulty water filling)}

TO REMOVE HEATER AND NTC

The heater & NTC can be accessed or measured from the right side of the dishwasher, but can only be removed by dropping the entire base (by flipping the dishwasher on its back) since they are wedged underneath the tank.

> Remove two (2) T-20 Torx screws holding heater assembly to sump.
> Disconnect wires from heater, flow switch, NTC & Hi-Limit after noting connections.
> Pull clips, then carefully pull heater assembly from sump & pump.  Note:  heater comes as an assembly (with housing & gasket).

[Softer bearing & no softer bearing heater assemblies, circulation pumps and sumps cannot be mixed and matched. Softer bearing heaters don’t fit in older models and older heaters don’t fit in softer bearing models.  If needed, use rinse aid to lubricate gaskets to make it easier to assemble heater to sump and pump.]

  Softer bearing & non-softer bearing heater assemblies are connected to circulation pumps differently.  Softer bearing models(UC/11 & above) have gasket assembled to heater and have a separate hose clamp (order #172272).  Older models(UC/06) have a separate gasket and do not have a hose clamp.  Heater assemblies contain NTC’s, Hi-Limit’s & flow switches(&aqua sensors where applicable). If heaters  are replaced, these parts are replaced too.

CLICK ON THE PICTURES TO MAGNIFY

THERMADOR DISH-WASHERS-HOW TO REMOVE DRAIN PUMP AND DISPENSERS & AQUA SENSORS

THERMADOR DISH-WASHERS-HOW TO REMOVE DRAIN PUMP AND DISPENSERS & AQUA SENSORS

THERMADOR _ SIEMENS _ BOSCH & GAGGENAU – DISHWASHERS

DRAIN PUMP

Drain pumps are mounted to sumps in the front of dishwashers -- they’re easily accessible from the front of dishwashers by removing toe kicks.

To remove & install drain pump
Tools needed: small flat blade screwdriver (for unlocking terminals).> Remove toe kick/base cover, pull up terminal cover and disconnect wires (using screwdriver to unlock locking terminals).> To remove pump, pull latch (on circular collar) & rotate pump clockwise (cw). To install new pump, insert @ 2:00 position & rotate counterclockwise (ccw).> Clean water & debris from base, then check float operation.> Connect wires, then install base cover & toe kick.

{See previous posts here for more details}

INSTALLATION TIPS

* Must have drain hoses with high loops (min. 20” high), even with air gaps *.* Drain hoses can be up to 10’ long – can add up to 4’ to dishwasher hose.* Secure drain hoses to rear of dishwashers with non-metal bands.* Make sure drain hoses aren’t kinked.* UC/43 & later drain pumps have (Rast 5) connectors, which aren’t interchangeable with older pumps with spade terminals.

# Drain pump is rated 120V, 60 Hz, 35W, 0.85A.

# Drain pumps in installations with Johnson Tees (in Washington State) must use stronger 4-vane pumps (#184178). Standard 9-vane drain pumps (#167082) are quieter and smoother than 4-vane pumps. Older pumps had 6-vanes.

# High loops are needed to prevent cavitating.  Often improper installations, not drain pump issues, cause dishwashers to not drain properly.

DISPENSERS_DISASSEMBLE PROCEDURE

CAUTION: Inner door edges are sharp.   Cover door edges and remove dispenser carefully.

To remove/install dispensers
> Remove outer door, remove fascia panel & disconnect wire harness from fascia panel. > Disconnect wire harness above dispenser, then remove wires to wax motor & sensor. > Disconnect condensation tube (for older models with condensation tubes in doors). > Remove any tape or wire ties. Bring replacement wire ties for reassembly. > Bend retainer tabs, then push dispenser inward toward tank. Protect hand with towel as inner door edges are sharp. > Replace from inside of tank - position O-ring seal and bend tabs to secure. Lubricate O-rings with rinse-aid & support inner doors to avoid damage if O-rings stick.

During each wash program, the wax motor opens twice, once to dispense detergent and again to dispense rinse-aid. The wax motor opens the same -- linkages open the detergent door & operate the rinse-aid dosage plunger. Dispensers can have reed switches or optical rinse-aid sensors. 

The white plastic linkage opens the detergent dispenser door, then cocks in place to dispense rinse-aid when the wax motor operates again. After the 2nd operation, the linkage resets for the next wash.

Optical dispensers have different connections and can’t be substituted for reed switch dispensers. Note 431413 top load dispensers also use solenoid actuators

instead of wax motors.

OPTICAL SENSOR DISPENSERS

Optical and top-load dispensers measure rinse-aid levels with optical sensors instead of reed switches.

DOOR LATCHES

Other than occasional misalignment, the only door latch repairs will be replacing micro switches. OlderSHU43/53/68 dishwashers used door latches with rods connecting them with on/off switches.  [Use only latches specified for each model. Latches can have differing closing forces, be suitable for specific door seals & can have child locks.]

* Remove T-20 Torx fascia panel screws from inner door.
* Lower fascia panel from door.
* Locate door latch in console.
* Bend out console metal tabs to allow latch removal.   

{Door latches for UC/14 & up models are different than UC/06 - UC/12 models; they cannot be interchanged. Must replace strike plate & door latch together.}

AQUA SENSORS

The aqua sensor only affects energy usage, eliminating a pre-wash and/or pre-rinse cycle if water is clean. Most customers won’t notice if an aqua sensor fails. It’s located on the rear of the sump and can be reached through the left side of the dishwasher (after the left side panel is removed – see page 4). It’s not necessary to block up the tank to reach the aqua sensor.

To change out the aqua sensor, pull off the connector and pull out the aqua sensor (toward the rear of the dishwasher). The aqua sensor slides into slots in the sump. Make sure the aqua sensor is properly inserted into the slots.

The Apexx Sensotronic 2 aqua sensor # 175340is similar to standard aqua sensor #165279, except it has two (red & green) soil sensors. They mount the same way, but are not interchangeable.

CLICK ON THE PICTURES TO MAGNIFY

BOSCH WFB1005 - WFB1005BY - WASHING MACHINE - WIRING DIAGRAM AND EXPLODED VIEW

BOSCH WFB1005 - WFB1005BY - WASHING MACHINE - WIRING DIAGRAM and EXPLODED VIEW

Exploded view & Wiring diagram_ Bosch Washing Machine WFB1005_WFB1005BY

EXPLODED VIEW

CLICK ON THE PICTURES TO ZOOM IN

BOSCH SIDE BY SIDE REFRIGERATOR - KAN56V - KAN58A - KAN58P - KAN60A – HOW TO RUN THE TEST PROGRAM – ERROR CODES – TROUBLESHOOTING ERROR CODES – HOME APPLIANCES REPAIR AND SERVICE

BOSCH side by side Refrigerator - KAN56V - KAN58A - KAN58P - KAN60A – How to run the test program – Error codes – Troubleshooting error codes – Home appliances repair and service

Category: Home Appliances Repair and Service 

Contents of this article 

• Error codes 
• Troubleshooting error codes
• Test program access  

BOSCH KAN56V - KAN58A - KAN58P - KAN60A 

Error codes and troubleshooting 

Error display Er F1
Freezer compartment sensor Interruption or short-circuit
Troubleshooting Test the control module
Repair Replace freezer compartment sensor

Error display Er r1
Refrigerator compartment sensor Interruption or short-circuit
Troubleshooting Test the control module
Repair Replace refrigerator compartment sensor

Error display Er rt
Ambient temp. sensor Interruption or short-circuit
Troubleshooting Compartment sensor is located on the control electronics module and cannot be changed
Repair Replace control electronics module

Error display Er d1
Defrosting sensor Interruption or short-circuit
Troubleshooting Test the control module
Repair Change defrosting sensor

Error display Er dR
Door switch refrigerator compartment Door switch has been open for longer than 1 h
Troubleshooting Open and close refrigerator compartment door
Repair Replace door switch

Error display Er dF
Door switch freezer compartment Door switch has been open for longer than 1 h
Troubleshooting Open and close freezer compartment door
Repair Replace door switch

Error display Er Ei
Ice sensor Interruption or short-circuit. Ice making is interrupted
Troubleshooting Test the ice sensor
Repair Replace ice sensor

Error display Er EF
Flow sensor No signal. Ice making is interrupted
Troubleshooting Flow sensor is in the water solenoid valve and cannot be changed
Repair Replace water solenoid valve

Error display Er Et
Horizontal switch ice maker Switch does not close during the ice making cycle. Ice making is interrupted
Troubleshooting Check horizontal switch on the ice maker
Repair Replace horizontal switch

Error display Er Eu
On / Off switch ice maker Switch does not close over a long period ? Ice making is interrupted
Troubleshooting Check On / Off switch on the ice maker
Repair Replace On / Off switch

Error display Er ES
Dispenser switch Closed for longer than 1 min
Troubleshooting Check dispenser switch
Repair Replace switch

Error display Er Ea
Motor for ice cube tray Motor defective
Troubleshooting Test function on the ice maker (green pushbutton)
Repair Replace motor

Test Program

Test step Function
1. Running time of appliance
2. Freezer compartment sensor temperature (in Fahrenheit)
3. Defrosting sensor temperature (in Fahrenheit)
4. Refrigerator compartment sensor temperature (in Fahrenheit)
5. Compartment sensor temperature (in Fahrenheit)
6. Time remaining until next ice making cycle
7. Time remaining until next water filter change

Enter Test Program