Miele dishwasher G2430 SCU ”intake / drain” light and no action - Page 1
Forum section: electronics / repair

author: Repairs_needed
author_rank: Newbie
timestamp: June 03, 2025, 01:10:37 am
content: I have a Miele dishwasher that is coming up on 15 years of heroic service, until now. When I hit go it makes a quiet humming noise and then the “intake / drain” light comes on and nothing else happens.So far I have followed all online help that I can find including: (1) cleaned all of the filters including the water inlet filter, (2) emptied the wash cabinet, (3) cleared the non-return valve, and (4) confirmed the impeller turns freely. My model has a ridge preventing me from getting anything in the drain valve.I put the unit on its side and took off the bottom. Fully disconnected the drainage hose (which was clear). I would be very grateful if anyone has views on whether the next step is to remove a whole bunch of wiring to get the drainage pump off to see if the jam is inside. Thank you very much in advance!

author: aeberbach
author_rank: Regular Contributor
timestamp: June 03, 2025, 01:24:35 am
content: Mine was maybe 8 years old when the same thing happened. Ended up dismantling everything, made it all clean enough to eat off, still no good. Serviceman came and quoted over $400 for a new impeller motor, then another service call + time to fit it, and just under $200 for the callout today thanks very much.Replaced the dishwasher instead. Miele stuff is good until it breaks, I like how they make nearly everything in-house, but it makes things expensive.

author: neillnz
author_rank: Contributor
timestamp: June 03, 2025, 04:26:02 am
content: I guess the most likely issue is a failed component but just in case I figured I should tell you my experience. When we had the intake / drain light come on on our Miele DW it was because of insufficient water feed pressure, that is the water supply could not keep up with the demand. The warning light does not tell you much at all.

author: Poroit
author_rank: Frequent Contributor
timestamp: June 03, 2025, 07:38:52 am
content: Is there a Strainer prior to the Pump?Not sure about Dishwashers but washing machines can have similar problem with discharge pumps due to " Stuff" getting stuck in the Impeller.I left a Pikster brush in a work shirt pocket one day so found out the hard way.You maybe able to remove the pump and bench test it with a power supply.Post a couple of pics.

author: jerryk
author_rank: Regular Contributor
timestamp: June 04, 2025, 08:24:27 pm
content: I had the same issue with my Miele multiple times. My problem was on the intake side. I have attached a diagram showing the flow restrictor at the intake valve and a photo from another site showing what it looks like removed from the valve. Use needle nose pliers to pull the flow restrictor out. If you hold the flow restrictor up to the light "as I recall", there should be a few tiny holes around the outside of the restrictor. I took a small wire and cleaned them all out and this fixed my problem.Hope this helps.Jerry

author: coppercone2
author_rank: Super Contributor
timestamp: June 04, 2025, 08:26:56 pm
content: I had some weird problem with mine some how a olive pit quantum tunneled past the filter and I think caused a problem? It was acting up electrically and leaking, I cleaned it up , ran a cycle with a pound of citric acid and its been fine for a yearwhen I was shaking it and shit like that a olive pit fell back into the basin under the filter. I don't know if it can get stuck in some valve and make something leak because of over pressure or whatand I keep it on a GFCI too just incase.I don't know how the water got out. It does that sometimes. There must be some cartoon stuff going on with the hoses or clamps under high pressure conditions. I had something similar happen with a washing machine that made a puddle near it and I could not find any leak for the life of me and its been fine for years. I did run alot of hot water through it and the related plumbing because I thought it might be related to soap build up.

author: floobydust
author_rank: Super Contributor
timestamp: June 04, 2025, 09:43:38 pm
content: Miele appliances are terrible in that you have no Right to Repair. No service manual, wiring diagram etc. is possible. I expect more from Germany. Blomberg as well, they are unpopular in North America because they railroad you into dealing with their service people only."Repairs should only be carried out by a qualified and trained person in accordance with local and national safety regulations. Unauthorized repairs could cause personal injury or machine damage". Think of all the people repairing their fucking dishwasher and causing the house to explode. What a scam.OP, check the water level sensor. Intake/Drain indicator flashes when the water level does not rise as expected during a fill, or it doesn't read empty after a drain.The control board will just go into lockout and halt. It could be a pressure switch is used instead.I think it's just a float with a magnet and reed switch, and with tubing/port that can get clogged. The reed switches fail as well on the small PCB.edit: the pic from a G2470 I think, where it is located and looks like it's a pressure switch. youtube vids on these too.edit2:service manualbest I could find, this thing also has a water flow sensor. So a few more things to check.'

author: Peacefool
author_rank: Newbie
timestamp: June 04, 2025, 10:02:16 pm
content: Was any fault code displayed? My Miele dishwasher (different model#) stopped working a couple of years ago with similar symptoms, and it showed F24 fault on it. It might be helpful to look at Miele's Technical Information manual--see attachment. In my case it turned out to be a faulty Heater Pressure Switch, which was replaced with a new part, and it's still going on strong... See also this video:and let us know how it goes.

author: Repairs_needed
author_rank: Newbie
timestamp: August 14, 2025, 10:36:26 pm
content: Thank you very much for all of the responses (and sorry for the delay, I got a little distracted and we have another dishwasher but it became urgent when the second one stopped working with exactly the same symptoms!).The intake was not blocked (took all the parts of the filter and the piece with the tiny hole at the bottom out and they were clean). Water pressure was fine but pressure might have been inconsistent because the washer in the faucet feeding the dishwasher had disintegrated and half of it was lodged in the end of the supply line before the dishwasher attachment. Clearing it out did not fix the issue though and plenty of water was coming through even when it was lodged in there.I finally crumbled and called a technician. He came to perform a $150 diagnosis and said it was “probably the intake valve” but he couldn’t be sure. Replacing the supply line (intake valve is built into it) would be $680. I thanked him for his time and said goodbye. On the way out he mentioned that I could replace it myself (the part from Miele is ~$200) or there are videos online with cheats for replacing it (https://youtu.be/-LaqSO-Oyuw?si=6CCquhQ-B1if9FbU). I went with option 2. I cut off the existing intake valve, replaced it with a $45 GE intake valve requiring minimal work (stripping a few wires, attaching spade connectors etc.) and it works like new. I guess all-in the repair cost $250 for two dishwashers (including the $150 diagnosis) which isn’t too bad.Thanks again for all the thoughtful responses.

author: jc101
author_rank: Frequent Contributor
timestamp: August 15, 2025, 07:51:51 am
content: Miele offers a fixed-price repair service in the UK. Our dishwasher did something similar, so I paid the fixed price repair cost of £269. The price is different depending on the class of device.After several visits and many replaced parts, it was determined that the issue was a blown part on the main CPU board. The fixed price scheme covered all the visits and parts. I believe we received a new intake valve for the water input pipe and a new internal reservoir, which includes an internal impeller to measure the flow; this single-piece part occupies the entire side of the machine. Plus the main controller PCB. Overall I think it took 4 or 5 visits to get it all working again.If they can't fix it, you receive the fixed-price repair fee credited against a new machine if bought directly from Miele.Don't Miele offer that in other countries?