I have the bosch shv46c03 diswahsher. We had a tech out that said the overflow pump was running and or broken. It is running because it preventing water overflow damage. TEch says he needs to remove entire unit and bring to his shop to replace pump....something smells fishy. Your thoughts would be greatly appreciated or a certified Bosch repair service in Los Angeles County, 91381 zip code. Many thanks..tad

If you can see water flowing down the overflow channel to the pan at the bottom of your Bosch dishwasher while it is running, this indicates that there may be a problem with the dishwasher's float switch or water inlet valve.
The float switch is a small device located at the bottom of the dishwasher's tub that is designed to detect the water level inside the dishwasher. If the water level rises too high, the float switch will shut off the water inlet valve to prevent the dishwasher from overflowing. If the float switch is not functioning properly, it may allow water to continue to flow into the dishwasher, resulting in water flowing down the overflow channel to the pan at the bottom.
Another possible cause of this issue could be a faulty water inlet valve. The water inlet valve is responsible for regulating the flow of water into the dishwasher. If the valve is stuck open or is not functioning properly, it may allow water to continue to flow into the dishwasher, resulting in water flowing down the overflow channel to the pan at the bottom.
To resolve this issue, you may need to have a professional technician inspect and repair your Bosch dishwasher. They can test the float switch and water inlet valve to determine the cause of the problem and replace any faulty components as needed.

Check if the lid isnt working as this prevents a roration . Else must be a loosened or broken belt that rotates the drum as the motor works . Hope this helps

Sounds to me like there may be water in the moisture sensor. Your dishwasher is probably leaking and the noise you hear is the drain pump activated.

Open up the filter and clean the filter out but also check the filter well.
Our bosch DW has a 2nd filter inside that.
Also check the filter is not broken.

---

Please dont forget to vote this answer was helpful

Many thanks

------

CLR

Not knowing the make or if the machine is logic controlled, it’s very hard to diagnose. If it’s a logic controlled machine, my guess is the board is bad.

check bottom of dishwasher screens for any blockages or obstruction preventing water from getting into pump. may need a wet vac to **** water out of pump and use a small mirror to inspect pump openings. if no obstruction, the pump impellor maybe broken. replacing the impellor is fairly difficult. the dishwasher has to be pulled from under the counter. repost if you further questions.

I have a Bosch that was stuck in pump down mode even when the door was open.
The problem ended up being too much water in the drip pan below the unit. There is a float in the drip pan that actuates the same limit switch as the internal overfilled float.
I had recently cleaned the incoming water filter and must have loosened the water line tube.

sounds like a problem with the pressure chamber. you better have a appliance tech come out to fix it.

Check drain hose first.

If you do not find any blockage, then you will need to access the pump, remove pump hose and look for blockage in there.

If there is no blockage at all, then either the water level switch, a faulty pump (not switching from recirculate to drain) , a wiring problem, or a faulty timer board can be cause the machine not draining.