Steam leaking from near temperature control sensor
There is a steam leak from the value or from the value fitting extruding from the steam (or water) heat sensor. This is the place where the temperature sensor can be adjusted using a screwdriver. I cannot tell if this is normal steam release that can be remedied by lowering the temperature setting, or if it is an actual leak.
Also, there have been instances where the water being fed into the grouper contains a sufficient amount of steam to force the water out of the grouper sideways. I feel like this could be a symptom of too hot a temperature, but it also might be an issue with a shortage of water resulting from the "steam leak. "
Also worth note: There have been some issues with the electricity in the building where the machine is operating that also seem to cause some problems with the water pressure. (The power seems to brown out to about 200V)
It sounds like a heating element issue. Those elements look like a single unit but are actually made up of 2 or 3 independent heating coils - one may not be working. So, you're only getting 1/2 to 2/3 heating capacity, which isn't noticeable until the machine is under heavy steam load.
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The water level in the steam boiler is too high. This water will sputter as it boils quickly when the steam tap is turned on to full and if the level is too high it will enter the steam exit pipe.
How to fix it:
Open the cover and inspect the steam boiler (this is the large one). It has two probes one is a temperature probe and leads to the micro-controller do not touch this.
The other sensor is the water level sensor. This appears as a stainless tube inserted into a gland type compression fitting.
The problem is that when the boiler is pressurised this sensor may be pushed out.
Obviously this alters the water level (it rises).
The cure is simple. Push on the tube until it is all the way down (or to your liking). Since it came out it should go back in.
You can untighten the the gland lock nut if it does not move (with boiler depressurised).
Tighten the lock nut just enough to hold the tube from popping out again.
Now switch on and wait to for pressure. Open the hot water to drain the boiler enough to cause the auto refill to start (and close it).
When it stops filling the water should be at the correct level (or at least a lower level)
Now open the steam tap and clear excess water.
Dry steam should be flowing.
This means the water cannot flow through the machine. Normal fix is to
prime the machine (turn water dispenser on, fill a cup) or descale the
machine. Go through the menu, select descale, enter, then turn the steam knob fully anti-clockwise. You should put the descaling solution in the water tank first.
If you have the auto-descale in the menu then run it. Run the solution through the machine twice. Then rinse well.
The following procedure works when you get the ventilate error:
The Ventilate sign can be due to one or more of the following reasons: Cause 1- Water leaking from the inlet valve below the water tank. The hose from the inlet valve to the pump can be air locked. When using the hand pump, do not thrust its nozzle too deep Cause 2- Blockage in the passage of water due to clogged passage anywhere between the pump and espresso delivery nozzle. Cause 3- Pump is not working. Open steam/water outlet knob and hear the pump work. If you do not hear any noise from the pump, this may be the main cause. Cause 4- Flow meter is faulty. This part is like the water meter for homes. It measures the flow of water and signals the electronic board. The malfunctioning flow meter will not send signals even when water is flowing through it. Cause 5- Hose is disconnected and water is not flowing in the system. Cause 6- O-rings at hose connection is leaking, reducing the water flow to be sensed by flow meter. Cause 7- Boiler gasket is leaking. Reduces flow of water through the system. Cause 9- Brew unit is blocked, blocking flow of water through the flow meter. This also causes pump to slow down and ultimately stop with muffled sound within 15 seconds. Cause 10- Brew unit not connecting brew valve, preventing flow of water. Same sign under cause 9. Cause 11- Steam is leaking. Registers reduced flow of water at the flow meter. Cause 12- Solenoid valve is blocked or solenoid coil is bad. Same observation as cause 9. Cause 13- Electronic Control board is bad. Though rare it can happen due to condensed water from leaking steam. When steam is leaking or boiler is leaking, machine should not be used any more to prevent steam shorting the Electronic board. Some of the above causes can be checked and corrected before seeking technical help. Do not assume anything without physically checking each of the following: 1- Make sure the water tank is full. If the water tank has water level float, make sure the float is in its housing and it floats as water is filled in the tank. If the level float does not rise with the level of water, then replace the float. 2- Water is not leaking from below the tank. The inlet valve is good. If leakage is present, replace the gasket in the water inlet valve. 3- Prime the machine by opening the hot water knob for 20 seconds or pressing the hot water button. Hot water flow shows the boiler is not blocked with minerals and pump is good. The solenoid valve is good. 4- Water & steam flowing normal, check the brew group for blockage. Determine when was the last time brew group was cleaned. Clean the brew group as explained elsewhere on these pages. If the machine has pre-ground function, try making a fake espresso (without coffee). Make regular espresso in other models to make sure that water goes through brew group and espresso is dispensed. 4- If hot water does not flow because the pump is not activated, then pump is bad. Replace pump. 5- Pump starts to work but within few seconds its sound is muffled and finally stop. This indicates there is serious blockage in the water line or the boiler is clogged with mineral deposits. If water is leaking and seen on the counter top, the chances are that water is leaking from hose connections(replace O-rings) or the boiler is leaking from seams (replace boiler). 6- Prime the machine by opening steam outlet for 20 seconds. Steam flow shows that steam boiler / steam outlet is not blocked. If the steam does not flow, then steam boiler or steam passage is blocked. Replace steam boiler or steam valve 7- Check the solenoid valves to make sure that they open & close as the coil is energized. Solenoid valve is located between the pump and boiler. The pump is activated simultaneously as the solenoid valve when espresso selection button is pressed. Some models may have a solenoid valve near the steam valve. In these models, the solenoid valve is activated to allow passage for steam/hot water. If the valve is not functioning, the ventilate sign will appear. 7- Hear the pump work when priming the machine. Louder noise from the pump can be due to ** air-locked water hose, or ** water is not sucked from the tank or the pump is sucking air instead of water or ** the diaphragm inside the pump has lost flexibility and not developing pressure to push water forward ** the hydraulic system is blocked at one or more locations due to mineral sediment. Find the location and cause of the block and correct it. ** Clean the brew unit (see cleaning instructions) and make sure that a- the ground coffee used is not powdery fine. b- The dose of coffee grounds is not in excess specification c- check if there is blockage. Find the cause and remove it. 8- If steam and hot water flow is normal, but the ventilate sign persists, then the flow meter or the electronic control board is bad. Replace flow meter or the control board, as necessary.
Try also the following:
Press hot water button once. Message on the screen will not change, this is normal.
Open the steam knob and allow the water to flow freely from steam wand into a cup. The screen should now read "Hot water,ventilate", you may need yo empty several cups of water before message changes. In some case it is necessary to refill the machine container without interrupting the operation.
As soon as the screen displays "hot water," turn the steam valve off .
If the machine warms up again, then problem is fixed.
Hi had the same problem. Probably it is the steam/hot water valve that leaks. I just bypassed it since you can not find it anymore & is from plastick, not reparable at all. Open top cover, see if at the right, where the handle to choose steam is the plastic valve is leaking or if it is covered with white powder (residu of calc of the vapourated water). If so this is the problem. Disconnect at te bottem of the valve the tube coming from the heater. (untighten the screw, pull tube out the hole, it is a sort of press fitting with a rubber ring) . Do the same with the connection on top of the heating blok and fit the first disconnected tube in it. No leak anymore. You can not have heated water or steam anymore. But coffee works again. Best is also to fix the staem handle into the neutral position, or disconnect the wires on the switches an put them permanently in the neutral status. (one switch is closed, the other is open. So nobody can trigger the steam anymore. Will not be ok since tubing is changed. Succes.
you evidently have an overfill. it can be from 1 solenoid valve,2 electronic level controller,3 level detector wire or 4 if the machine is frozen and it mix waters You should eliminate them 1 by 1 by this order: - swich on water supply and open steam knobs. Wait 5 minutes, if water does not leak from pipescontinuously you just eliminated $ freezing problem - leave steam and tea valves open and switch on power of machine, wait until electronics fill few seconds(it is programed to do so each time is switched on)>> wait until you see water leaking from steam pipes, wait them to start giving you steam, if steam start coming from steam pipes that means you got the level back in normal. l.NOW YOU SHOULD control 1 2 and 3 Be patient and wait to rise pressure on the boiler and control the level of water. if the water level rises again you should:check the detector wire(be sure that the part in water is not insulated with calcium, that the wire and the fitting of the wire are good separated and insulated by teflon insulation and be sure that wire from circuit is good attached to detector wire) check the solenoid valve: detach the wires to solenoid valve for tank filing, cool down machine to loose all steam and open the fitting attached to exit of solenoid valve , the exitwhichsuppliesthe tank with water. make sure that is still attached towater supply and wait to see if drops are coming from valve IF IT IS SO THANMECHANICAL PART OF VALVE IS DAMAGED situation: if we checked 4,1and 3. If they are in order than remains only part 2 controler controler should be checked in someelectronicsworkshop or replaced with new
you evidently have an overfill. it can be from 1 solenoid valve,2 electronic level controller,3 level detector wire or 4 if the machine is frozen and it mix waters
You should eliminate them 1 by 1 by this order:
- swich on water supply and open steam knobs. Wait 5 minutes, if water does not leak from pipes continuously you just eliminated $ freezing problem
- leave steam and tea valves open and switch on power of machine, wait until electronics fill few seconds(it is programed to do so each time is switched on)>> wait until you see water leaking from steam pipes, wait them to start giving you steam. If during this you start to see ball it means you succeed to empty the boiler enough to get it in normal. NOW YOU SHOULD control 1 2 and 3
Be patient and wait to rise pressure on the boiler and control the level of water. if the water level rises again you should:
check the detector wire(be sure that the part in water is not insulated with calcium, that the wire and the fitting of the wire are good separated and insulated by teflon insulation and be sure that wire from circuit is good attached to detector wire)
check the solenoid valve: detach the wires to solenoid valve for tank filing, cool down machine to loose all steam and open the fitting attached to exit of solenoid valve , the exit whichsupplies the tank with water. make sure that is still attached to water supply and wait to see if drops are coming from valve IF IT IS SO THAN MECHANICAL PART OF VALVE IS DAMAGED
situation: if we checked 4,1and 3. If they are in order than remains only part 2 controler
controler should be checked in some electronics workshop or replaced with new
You need to contact Delonghi and order a part. This is the steam/water outlet assembly. This part includes an electronic solenoid which controls the water and steam output. I have had this problem 3 times. You may find the steam/ water is very loose when you try to wobble it sideways. This is the indication as to what is the problem, (as mentioned above).
Initially, pls check for steam leaks. This model has been known to have issues with leaks preventing it from reaching the correct pressure/temperature. Since the leak could be visually checked, it would be a matter of determining at what point/component would the steam be coming out other than designated point. Often, it would be a joint with a rubber seal or a tubing entry point.
Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information. Good luck and kind regards. Thank you for using FixYa.