Miela cv 615 water tank leaking and parts manual

First I'm not a Delonghi tech. But I have worked on similar table top "Super Automatic" machines. You should call your vendor for service as there is no customer serviceable parts in this machine.
*** the following is for information only. ***
* There are usually separate boilers for table top units. There is a pump and heater system for each section. (usually 2 for this type of machine. But there may be a third system if you have the Coco option.
* Since each system is separate then your Latte/cappucino system has a problem. I will list the most common but all require a qualified service tech to repair/replace. (lots of small parts crammed into a very small space.)
* Cap/Latte Membrane button not working. If it feels mushy (not like the other buttons) then the button panel needs to be replaced.
* There is a CPU/PC board malfunction. Replace
* There is air in the water line to the Cap/Latte system. Make sure the water tank is filled. Power down. Wait 10 seconds. Power back up. Press the Cap/latte button to start the pump. Watch the steam wand if water flows out. If it does, then wait 30 seconds and try again. should be steaming.
* No steam or at least hot water? Just cold water? Then the steam heater and/or thermo-fuse, thermo-disk, needs to be replaced.
* Got hot water but little to no steam? Then steam unit and/or thermo disk needs to be replaced. (best to replace both as a whole unit; tank, Heater, and Thermo-disk)
* Heats up very hot but sputters water and steam. Clean steam wand and/or tip (if removable) If it leaks steam at the top of the wand near the body of the machine then the whole wand needs to be replaced.
* Still sputtering? The steam system is clogging up. Call for service.
* Final; I'm not a fan of de-scaling as it causes more problems for the machine. I've always found that using filtered water (bottled ok) is best. Water softeners if available is okay. BUT stay away from HARD water and Ultra Pure (100%) water as it leaches out the metal ions from the machine.
Aloha, ukeboy57

P.S. Since you have already taken things apart, I'm guessing you don't mind jumping to the 'guts'. Your probably looking at a clog at the vibration pump all the way to the hot water (or steam) tip. It can clog anywhere there is water. It may even be the water hose (with filter?) or the water tank. Start from the tank and keep trying to get water to flow through each section. You will need power for this so be careful! There are a lot of you tube vids showing how to check the common vibration pump. Bring your reading glasses as it have very small parts (and don't lose the spring or the small ball!) Good luck! Aloha, ukeboy57

First I'm not a Francis tech. But I have worked on similar table top machines. You should call your vendor for service as there is no customer serviceable parts in this machine. (To your question, Yes, it can be fixed but you may find it costs more to fix than to replace it with a new machine.)
*** the following is for information only. ***
* There are usually separate boilers for table top units. There is a pump and heater system for each section. (usually 2 for this type of machine. But there may be a third system if you have the Coco option.
* Since each system is separate then your Latte/cappucino system has a problem. I will list the most common but all require a qualified service tech to repair/replace. (lots of small parts crammed into a very small space.)
* Cap/Latte Membrane button not working. If it feels mushy (not like the other buttons) then the button panel needs to be replaced.
* There is a CPU/PC board malfunction. Replace
* There is air in the water line to the Cap/Latte system. Make sure the water tank is filled. Power down. Wait 10 seconds. Power back up. Press the Cap/latte button to start the pump. Watch the steam wand if water flows out. If it does, then wait 30 seconds and try again. should be steaming.
* No steam or at least hot water? Just cold water? Then the steam heater and/or thermo-fuse, thermo-disk, needs to be replaced.
* Got hot water but little to no steam? Then steam unit and/or thermo disk needs to be replaced. (best to replace both as a whole unit; tank, Heater, and Thermo-disk)
* Heats up very hot but sputters water and steam. Clean steam wand and/or tip (if removable) If it leaks steam at the top of the wand near the body of the machine then the whole wand needs to be replaced.
* Still sputtering? The steam system is clogging up. Call for service.
* Final; I'm not a fan of de-scaling as it causes more problems for the machine. I've always found that using filtered water (bottled ok) is best. Water softeners if available is okay. BUT stay away from HARD water and Ultra Pure (100%) water as it leaches out the metal ions from the machine.
Aloha, ukeboy57

First I'm not a Delonghi tech. But I have worked on similar table top "Super Automatic" machines. You should call your vendor for service as there is no customer serviceable parts in this machine.
*** the following is for information only. ***
* There are usually separate boilers for table top units. There is a pump and heater system for each section. (usually 2 for this type of machine. But there may be a third system if you have the Coco option.
* Since each system is separate then your Latte/cappucino system has a problem. I will list the most common but all require a qualified service tech to repair/replace. (lots of small parts crammed into a very small space.)
* Cap/Latte Membrane button not working. If it feels mushy (not like the other buttons) then the button panel needs to be replaced.
* There is a CPU/PC board malfunction. Replace
* There is air in the water line to the Cap/Latte system. Make sure the water tank is filled. Power down. Wait 10 seconds. Power back up. Press the Cap/latte button to start the pump. Watch the steam wand if water flows out. If it does, then wait 30 seconds and try again. should be steaming.
* No steam or at least hot water? Just cold water? Then the steam heater and/or thermo-fuse, thermo-disk, needs to be replaced.
* Got hot water but little to no steam? Then steam unit and/or thermo disk needs to be replaced. (best to replace both as a whole unit; tank, Heater, and Thermo-disk)
* Heats up very hot but sputters water and steam. Clean steam wand and/or tip (if removable) If it leaks steam at the top of the wand near the body of the machine then the whole wand needs to be replaced.
* Still sputtering? The steam system is clogging up. Call for service.
* Final; I'm not a fan of de-scaling as it causes more problems for the machine. I've always found that using filtered water (bottled ok) is best. Water softeners if available is okay. BUT stay away from HARD water and Ultra Pure (100%) water as it leaches out the metal ions from the machine. If you must descale then follow the MFR instructions and use approved solutions.
Aloha, ukeboy57

The problem is a very frequent one a small scale part have been moved and it stack to the water steam valve and it blocking it from closing completely. So when you make coffee the hose of water for coffee is in parallel with hot water steam wand and since the valve remains partially opened the water for coffee find easy escape from steam wand.

So we suggest to perform one more descale and it may need twice hopefully this small scale part to be dissolve a little bit more in order to pass thought the steam valve and thus the valve can close again completely. If you are not so lucky the part remain on the valve then only solution is to disassemble the machine thus clean the steam valve manually. In this solution you may find out that the valve o ring might be damage and thus the leak.
here is the link with steam valve parts and this the parts diagram of the machine and here many more for your machine

Descaling Saeco Automatic espresso machines SAECO VIENNA SUPERAUTOMATIC MACHINES:
SAECO VIENNA DIGITAL - MANUAL DESCALE PROGRAM
1. Fill the water tank with the Saeco descaling solution. (1 bottle of Saeco descaling solution to one full tank of water.)
2. Turn on the machine. Run approximately 1 cup through the steam wand by turning open the hot water steam valve). Turn machine off and let sit for 5 minutes.
4. Repeat this procedure until the water tank is empty. Then rinse water tank thoroughly and flush the machine by running two tanks of clear water through the steam wand.
5. To clear the "Decalcify" message on the Digital model, press the MENU/OK key to go into programming mode. Scroll up or down to select the "Signal.Descal" function. Press MENU/OK. Next, the messages " Quantity Water Not Reached" and "Left Quantity" will flash. Press MENU/OK again - the message "Reset Descaling Program - Yes" will appear. Press MENU/OK again. The Descale meter is now cleared.
SAECO VIENNA DIGITAL - AUTOMATIC DESCALE PROGRAM
1. Press the MENU/OK key to go into programming mode. Scroll up or down to select the "Descaling" function . Press MENU/OK key. Place a large container under the hot water/steam nozzle. Fill the water tank with Saeco descaling solution. (1 bottle of Saeco descaling solution to one full tank of water. Refer to the instructions on the bottle).
2. Then completely open the hot water/steam rotary valve/knob. The pump starts and the descaling program begins. During this phase the pump runs at intervals and the message "Machine is Descaling" is displayed. The complete program takes about 40 minutes. Do not add any water to the tank during this phase. When the message "Descaling Finished" appears, close the hot water/steam valve. The message "Rinse Machine" will appear.
4. Remove and rinse water tank thoroughly, fill with fresh water and replace on machine. Empty the container under the hot water/steam nozzle and replace. Flush the machine by running the tank of clear water through the hot water/steam wand until the message "Rinsing Finished" appears. Exit the Programming mode by pressing "MENU/OK" Refill the water tank with fresh water.
5. To clear the "Decalcify" message on the Digital model, press the MENU/OK key to go into programming mode. Scroll up or down to select the "Signal.Descal" function. Press MENU/OK. Next, the messages " Quantity Water Not Reached" and "Left Quantity" will flash. Press MENU/OK again - the message "Reset Descaling Program - Yes" will appear. Press MENU/OK again. The Descale meter is now cleared.
Descaling Single Boiler Home espresso machines (HOME SINGLE BOILER ESPRESSO MACHINES)


Approximately every 3 months (depending on your use and the water hardness), clean the machine with natural citric acid based decalcifying agent.
1. Add a descaling solution into the water reservoir. Mix thoroughly to dissolve (use warm water for better results).
2. Remove the filter holder and place a cup under the group head and another cup, or other container, under the steam wand to catch cleaning solution.
3. Turn espresso machine on, turn coffee pump on and run approximately 8 oz. of solution through the brew head. Turn machine off and let the machine sit for 15 minutes.
4.Run approximately 8 oz. through the steam wand, and again, turn machine off and let sit for 15 minutes.
Repeat by allowing solution to run alternately through the steam wand and brew head. Turn espresso machine off after each cycle. Repeat process until solution has been run through.
5. Do not leave espresso machine on. Do not wait for the ready light to come on. Do not use the steam switch during this process. Do not allow reservoir to run empty!
6. Rinse reservoir thoroughly with fresh water. Refill reservoir with fresh water. Run half a tank of fresh water through group head, alternating between group head and steam wand.

Do you hear the pump working but no water flows?

You should select hot water (the third button from the right) and the display should say "hot water" at the same time it is saying VENTILATE --- open the steam valve all the way and the pump should start and you should see water from the steam wand.

If you don't hear the pump at all, then that is a different problem.

If you do hear the pump but still don't get any water with the steam valve open, then you need to prime the pump by using a turkey baster or the accordian pump that came with the Titanium to pump water into the valve where water from the tank goes. Remove the tank and use the turkey baster to pump water into that valve while the pump is running and the steam valve is open all the way with HOT WATER selected. the second water starts to come out the steam valve you want to stop the pump (turn the power off or turn the steam knob shut) and put the water tank back on and make sure there is plenty of water in the tank - then start the pump again by opening the steam valve all the way and let it pump water out the steam wand for a few minutes.

First,I'm NOT a Breville tech, but this is a very common problem with steam boilers. Your valve seal(s) are worn and needs replacement. Any leaking water or steaming from various places other than the steam tip is causing your tank to lose pressure. The heater needs to stay on longer just to keep everything up to pressure and properly heated. You probably noticed that your shots may not have the creme or very thin and watery. Milk steaming takes a long time or not enough steam to complete a froth, especially on a Latte. Your machine needs servicing. Contact your vendor or MFR for service.
** loose steam wands will fall off and be re-assembled without the ball seal or washer. Look around the machine for a round disk made of hard rubber or nylon plastic. Take apart the wand and reassemble with the washer or get a new washer and tighten,.
** other places were you can loose steam pressure is the Anti-siphon valve, Safety valve, and various pipe fittings to the steam boiler. Look for steaming plumes from unexpected areas of the machine.
** Scale that has built up to the point of causing valve problems are usually too much for DE-scaling to work properly. Usually done as a preventive maintenance rather an alternate to repair. Like a blood clot, if you remove it while still in an active system. Where does this clog end up? This debris needs to be physically removed from the pipes, valves, and/or tank. Heavy scaling is a sign of an old machine that will need a lot of servicing to bring it up to MFR specifications.
** Final; The steam wand(s) are the most used (and abused) parts of the machine. Constant cleaning is a required task that needs very diligent baristas to keep it fully functional. I've found that best operators use the following method to keep the steam wand in top condition; Remove milk froth pitcher completely from wand, Send a short blast of steam to clear milk residue from tip. Take a damp towel to grab wand an pull downward to wipe off any remaining milk residue. Leave the wand in a pitcher of cool water to soak during long break periods to help break up any dried milk. Let soak over nite when not in use. Have your operators notify you of any 'loosey-goosey" wands. Tighten them properly but make sure all the parts and washers are there. Check your manual or just ask your technician to show you the next time.
*Have a safe New year! Aloha! ukeboy57

If it leaks from the steam wand then you need to get a new steam valve assembly. For the heat you will have to open the machine it is possible that the steam boiler is damaged or that the thermostat on there is bad, use an ohmsmeter to check thermostats and element. There are 2 screws in the grinder, 2 behind the water tank and about 2 or 3 in the front behind the door.

Remove screws in the grinder(2), then the one in the back you will need a long screwdriver for that one, there is one under the water tank, and there are 2-3 in the front of the machine behind the door.

Your tank may be full but water is not getting into the system. The only way for the red light to go away is to have water come out of the other end...either the coffee spouts or the steam wand. The word they use for this is "pump priming". Thus, either the motor is not sucking water in or there is blockage. Unless water gets out to the other side, the red light will stay on. Before getting dirty with the system, check the tip of the steam wand...if old milk is blocking that end. You will know this is the case when you turn the steam knob counter clockwise to release water but you only hear a semi-startup on the motor and then abruptly stops while the steam knob simultaneously pops out a little bit. It indicates a "blowback"...that there is blockage at one end of the pipe (ie steam wand). Get the residue out by dipping the wand in a tall glass of hot water...wait for a few minutes and blow it out with using the steam knob. Should be ok after that.--Mabada1