Bosch diswasher detergent dispenser doesn't open during wash cycl
The dispenser doesn't open and release detergent during normal washing cycles. The dishes appear to be clean, but there is detergent remaining in the compartment after cycle completion. This is anew problem. I can open the lid manually with no problem so nothing appears to be in the way.
The model number is SHV66A and is the premium dispenser.
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Whirlpool dishwashers use a wax motor or a solinoid to release the door at a specific time during the cycle. So for proper cleaning the soap cup is nessesary . The part isn't that expensive and fairly simple repair.
Sounds like the dispenser door isn't opening. If it isn't being blocked by dishes, the dispenser door spring might be broken, the dispenser release solenoid could be faulty, or not getting power from the control panel. While you're waiting for it to get fixed, you can just put the detergent in the bottom of the dishwasher and run it on normal cycle. It also possible the dispenser door isn't opening wide enough for the puck to fall out. Make sure the door opens freely under it's own spring assist.
There are a few possibilities here but I really need a little bit more detail from you and you're going to need to do some testing to determine the cause of the fault - or faults. You're going to need a Torx T20 screwdriver and a multi-meter which can measure volts and ohms for this.
The endless cycle times are commonly due to a fault in the water heating circuitry, but this could be anywhere from the heater relay on the timer/controller to a defective water heater. The failure of the detergent dispenser to open could also be due to a defective controller, but it could be the detergent dispenser release mechanism or the actuator for the dispenser that is defective.
There are so many possibilities here, I need to eliminate some before making any further suggestions. Please could you answer the following questions to assist me in solving your problem.
1. Your country - to determine power supply voltage and whether the dishwasher is hot or cold fill.
2. The model number of the dishwasher for component locations and disassembly instructions.
3. Is the water getting hot during a wash cycle?
4. Does the detergent dispenser open on any of the shorter wash cycles?
5. Do you have - or can you borrow - the tools Iisted above?
The best place to start would be to test the soap dispenser and a visual inspection of the PCB in the timer/controller for a burned out pin on the heater relay (more common in US models).
Please reply to me with these details and I'll get back to you asap.
Dishwashers use Bi-Metal strip to allow the dispenser to open/close. This
strip when heat up causes the soap door spring to open up the dispenser. If
this strip is not heated doesn't allow the door to open. The strip may not be
getting 120V or maybe disconnected. Newer (plastic liner) dishwashers use a wax
motor to open the soap dispenser. The plunger inside the wax motor slowly
moves and pushes the plunger and door open. And, if this wax motor doesn't
receive 120 volts, then it'll not work. Please check the voltage to the wax
motor/Bi-metal strip; also inspect the connections to these. Hope this helps...
take door outer panel off and dispenser is exposed. start cycle and with a multimeter, check power comes to the dispensor during the cycle. if you get power, then the dispensor is faulty. if no power, then the module is faulty
Behind the dispensor door there is a small selanoid you will need to replace this, test to see if its open circuit, alternatively you can just place the detergent in side the machine before you put it on a wash cycle is this would have the same effect. the only cycle you can not do this on is the one with the prewash, I think its number 1.