Question about Miele CVA4070 Coffee Maker

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When the brew unit open to put the waste into the container, this part of the unit stay open

When the brew unit let down the coffee ground into the container, this part of the unit stays open and I can not use the machine and I can not take out the brew unit from the machine. The failure number is 73. I used already the menu service, but the brew is ok, the thing open is the problem, could you help me?

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OK I had this precise problem .. initially I got F73 occasionally and then increasingly more frequently over about a 2 week period. When the error comes up the first problem is that you cannot remove the Brew Unit. The Correct procedure is to enter Service Mode and then you have the option of resetting the position of the Brew Unit. For instructions on this consult the Service Manual which is available online for free ... just search for 'CVA4070 Technical Information'.

Now in terms of what can cause this (as the manual does not explain the reason for the fault in my case) ... at first I thought it was the Brew Unit getting sticky and thus too hard for the motor to return the unit to its home position. The motor is actually very strong due to internal gearing and this is unlikely to be the problem unless it's very stiff. In my case it turned out to be one of the two reed switches on the back of the motor drive was very slightly worn (it wears out because it drags on a cam) and this prevented the motor drive from stopping at precisely the right position during the sequence. This then resulted in the machine getting confused about what state the brew unit is in and so it says F73 . The two reed switches that control the Motor drive are accessible from rear of machine by removing the black cover of the motor drive. I can't recall which one was at fault for me .. but if you operate the machine with the motor drive cover off ... and then reproduce F73 ... you can actually see that it has not stopped in the right place on the reed switch and then you can work out which reed switch is causing the problem (also refer to manual which has a good explanation of states). There are two other read switches in the machine of the same type and these are not critical in terms of the wear issue so you can swap these over for the brew unit ones. Alternately you can buy new ones. It's a simple job just to replace them and the Miele service person would probably do it in 10 minutes. Now problem is fixed.

Now if you're doing this yourself ... you should also do some servicing at the same time;

1. Apply grease to the cam that controls the reed switches (this will prevent wear of the reed switch buttons).

2. On the back of the Brew Unit at the top .. there is lever that has ridges on it that activates one of the other reed switches (grinding amount compensation). Apply grease to this. (This can also stop an annoying clicking sound each time you brew coffee).

3. Apply grease to O-ring on the spout of the coffee on inside of door

4. Clean back of machine with vacuum cleaner and then with warm water .. it get fairly dirty. You can take pieces off to clean more thoroughly

5. If your technically skilled .. remove the Brew Unit Drive .. disassemble, clean & re-grease. After 5 years or so its gets dry and you do not want to have to replace this unit. WARNING: Note position of cogs and the cam before you disassemble (ie take pictures) and make sure you put it back in the same way. I did not do this and I broke the plastic cam .. which is designed as a weak link so that metal gears inside motor and brew unit drive are damaged.

Finally ... coffee machines are high maintenance and even Miele ones break-down. Miele spare part prices are very high but what I like about this machine is that it is designed to be serviced.

Posted on Dec 18, 2012


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Posted on Jan 02, 2017

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SOURCE: Miele CVA 4075 brew unit locked

Turn your machine off. Close the door. Depress <clear>, holding it down, press <on/off> then let go of both. Then press <clear> 3 times. On 3rd time, hold it until Service menu appears. Select <brew unit> then press left arrow to turn from <off> to <on>. Then press right arrow by <select> This will turn your brew unit drive to the correct position and you should be able to get your brew unit in/out and your waste container back in. Make sure to turn your machine off/on again to get out of Service Menu. I have a picture of how the wire needs to be inserted to get that back on. It's definitely not intuitive, but send another note with your email address and I can send the pics.

Posted on Jun 03, 2010

  • 1 Answer

SOURCE: miele coffee maker cva 4070

OK. Here's the deal. I struggled with this CVA 4070 (F 73) problem also recently, and even posted a questions in the cyber world about it. I jiggled, re-cleaned the machine, re-read the Miele manual, and scoured the internet for schematic drawings of this brewing unit's insides. No luck. Finally after finding out I'd have to pay $199 just for a service clown to walk in my front door, I said NYET!!!  I must solve by myself. If I can take apart & fix my Dyson, etc, etc, I WILL DO THIS TOO!!  (MUST HAVE COFFEE>>>)
Pull out the brewer, turn it a quarter-turn to your right, and look at the spot where that small black plastic piece -- shaped like a block "M" or block "W" -- should be situated. Pull it out, if it isn't out already. Don't worry about yanking it out or harming these parts, said the Miele troubleshooter guy in New Jersey on the phone. They're "made from the same plastic used in football helmets."  Okey-dokey. 
This approx. 1.5" wide, blocky plastic piece is part of the "slide" that takes the brewed coffee grounds into the waste container. When positioned correctly, it looks like a block "W,"  with the "wings" ointing up, and slides in just under a brown 1.5" flat piece. A small, down-facing tab on the brown piece clicks into the "W" piece and holds it in place. The "W" should feel fairly solid, although it is not rigidly in place, as the entire mechanism is a movable system to deposit the grounds in the waste receptacle. 
Put everything back inside your CVA 4070 "love" machine, hit "on," and wait for it to go through its warm-up.  No F73 message?  Yeah!  Mission Accomplished. You, like I, have fixed your Miele, saved your family relationships, and saved yourself a bundle from unnecessary service calls.

Posted on Apr 09, 2009

  • 2 Answers

SOURCE: I have a Miele Coffee

The brew unit has lose parts on left-hand-side, wiggle them up and down. Put the waste unit back, switch off the machine and then turn it on (pull the cord). It worked for me!!!

Posted on Mar 15, 2011

  • 128 Answers

SOURCE: I have a cva coffee machine it seems like the brew

F73 is a bad brew unit. The cva 4070,4075,4060, and 4066 are designed to use espresso beans.
If you use an oily bean such as Starbuck's french roast, it will clog the filter in the top of the brew unit. If you catch it in time, you can just replace the brew unit. If you run the machine with a clogged filter long enough, you have to replace the brew unit and gearbox together.
Sometimes if you work with the tech support department, they will send you a brew unit to install yourself. If you live in an area that has Miele factory support, you may just want to get a service call. It is very important to rinse the brew unit every 24 hours, and to use the cleaning tablets in the trap door( not the descaling tablets) if not, the coffee oils build up and turn into a tar that will clog the brew unit. They run about 300 dollars so they are worth doing the maintenence on.

Posted on Nov 21, 2010

  • 2069 Answers

SOURCE: I own a Meile CVA 4070 coffee system. The Brew

In order to reset the brew unit drive so you can get the brew unit out, turn the coffee machine off. Then press , holding it down, press then let go of both immediately. Then press 3 times. On the 3rd time, hold until the Service Menu appears. Then go into and press the left arrow button to turn the digital display from to . Now press the right arrow button next to . You'll hear the brew unit drive turn. This reset it and now you should be able to pull out your unit or put it back in - whichever the problem is.

Posted on Oct 29, 2010

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