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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.
Hi I have seen all ways to descale espresso machines on this and other sites and most are wrong! Never leave the machine heating while the descaler is in the boiler. It's OK for a few seconds but never for minutes or hours. It will turn your seals hard as a rock and the machine will start leaking. If your machine is leaking you probably left your machine on while it was descaling. Factory programs, if used do not turn the boilers on in the descale mode for this very reason. If your machine has a factory descale mode, use it. All factory descaling programs use the flow meter to regulate the descaling. The flow meter tells the computer how much water has gone through the boiler. when the machine is out of water the flow meter will stop turning and the computer knows the machine has used up all the descaler, and it will want to be rinsed. Remember the pump has to stop on its own for the computer to know it's done! Again the flow meter will tell the computer it is rinsing and when it is again out of fresh water it will tell the computer it is done rinsing and the descaling message or light will disappear. Remember the pump has to stop on its own for the computer to know it's done! It may say descale on some computers and there is a program for resetting the descale. It's in your menu as "Reset Descale". Choose "Yes" and push the menu button to lock. It's all regulated by your water hardness. I have mine set on 4 and my water is very good. I have over 20,000 drinks, and the original boiler. Saeco(Starbucks) Barista Digital. This method can be used on any espresso machine. 1. Remove the water tank and fill half way with fresh water. 2. Mix your descaling powder (Citric Acid or Durgol Never use Vinegar) in a glass of warm water. When dissolved pour into water tank. 3. Open steam knob. Have a large bowl under the wand to catch the water expelled from wand. 4. Turn on machine (automatics will cycle then start pumping water) Regular espresso machines you will need to turn on the brew button. 5. When the pump has expelled about 8 ozs through the steam wand turn off only the power button. Leave the other buttons and knobs alone. 6. Wait about 10 to 15 minutes for the descaler to work, then turn the power button on and run another 8 ozs through the wand and turn off the power button. 7. Repeat step 6 until the water tank is empty. (machines that have magnets in the water tank will not let you pump the water tank dry but they have programs built in to use that will) 8. Once the tank of descaler is empty, rinse out and fill with fresh water. 9. Open steam knob and run the complete tank of fresh water through the boiler without stopping, and once its complete refill with fresh water and your ready to go.
You gave a good description of the boiler-- now we need to hear the clues you have observed, as it fires (or fails to fire-- or what?)
Or as the water flow-- or doesn't flow? As the cold water enters-- what does the flame do? And does the flow rate reduce as the flow gets to the divert er valve?
How old is the boiler?-- and have we been using HARD water? (Any water softener in the circuit to remove calcium and magnesium, etc.?) Do you suspect a scaling problem in the interior parts? If so-- can you circuit an acid thru the innards, to clean up the scale?
Please comment on what happens when water and gas flow-- so we can help you get to the next step.
If you open the steam tap while the pump is running does water come out? if so then you might have a blockage in the coffee solenoid or the bottom of the boiler. Do you hear a 'click' sound when you hit the coffee switch? If not the coffee solenoid may not be operating. The most common cause of the problem you are having though, is scale flaking off the boiler walls causing a blockage where the coffee water comes out. Try hiting the coffee switch, opening the steamer and then if water starts pumping out, close the steamer and see if water starts flowing out the coffee group. Do this without the portafilter (coffee holder) in place.
If you do get water flowing trough the group, try backwashing the machine.
If these things dont help then you should take it to an authorised repairer or open up the boiler yourself if you are a handy person and have access spare parts. Good luck, these machines can make a great espresso when in the right hands and working order.
This is going to take a while because I have so many qusetions.
1- Check the external pump to make sure it is connected correctly. If neccessary also check water lines just loosen the slightly to make sure you have water flow.
2- Do you have water in the boiler? check sight glass. If no, remove vent valve and fill machine from top, until you see water in the sight glass.
3- The main switch is a 2 position switch, meaning you have off-fill-on. When turning the machine on only go one turn to the right until the autofill stops running. (this turns on the autofill which in turn sends power to the pump).
4- Check the wires at the element to see if they are damaged.
5- Check the autofill solenoid, it may not be operating properly.
What is the temp at the boiler? there is a temp/ presure guage it should read 160-180F. If that is OK then check the circulating pump. When the thermostat is turned up you should hear a little water moving through the piping as you have adjusted the system. If you hear nithing circulating you may have a defective pump.