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First, I'm not a Talea technician. But I've worked on similar machines.
* The air that comes out in the end may be normal for your machine as most of these small home units will "air flush" the coffee grounds to get every last bit of the brew out. This also helps keep the unit clear of old coffee liquids.
* pour pour, shot, puck, etc. are signs of an improperly prepared espresso. This can be caused by many things but since this is an robotic machine that performs the same time and time again then lets assume for now that the machine is working properly. If the machine is at fault then it will require service from your vendor or directly from the MFR.
* Did you change beans? Poor quality beans are usually easy to spot; Lighter color beans, Multi-color, very oily (shiny ok but not dripping like butter), flavored beans (poor quality bean with flavor added). All automatic espresso or cappuccino machines are expected to have Espresso roast with French roast or at least a Dark roast as the basis for any coffee beverage. Lesser roasts; regular, mild, house roast tend to make a poor cup. Clean out all old coffee and replace with a high quality ESPRESSO roast coffee (Lavazza is a good example) Run machine through 3 or more cycles to flush out old beans and oils. It may take 10 or more cycles so be patient.
* Did you change water source? Since this is a table top machine in which you fill the water tank. Try to use filtered (bottled ok) water. Do Not use Distilled or 100% pure water as this type of water will eat out the metals from your machine! Some places use a water softener as it tends to be better for the machine long term (years).
* Finally; Beans and Water are the two things you can control. If your still having problems then lets look at the machine: Can you reset it to original factory settings? Do so and check results. If it's okay then SLOWLY make your changes one at a time till you get the best result or stop if it gets worst. Note: once set to your liking then DON'T change beans or water as it will change everything. (even a batch of beans can be bad. Stay with a reputable coffee roaster!)
* Still got problems? Check with vendor or MFR for service or replacement. Most machines of this type do not have serviceable parts or adjustments.
Push "Off" on the coffee maker's control panel. Unplug the coffee maker, and allow the machine to cool down completely. Remove the coffee bean container by lifting up on it and sliding it out. Wipe it out daily with a damp cloth, and slide it back into the coffee maker. Press down on the handle to click the container into place.
Dump out the water in the water container,Wipe out the water container with a damp cloth. Refill the water container with clear drinking water.
Remove the dump box and drip tray, and empty them.Wipe each one down with a damp cloth. Open the service door and push "Press." Remove the brew group by its handle, and rinse if off in a sink with hot water. Use the key provided to unscrew the plastic pin holding the metal filters together. Rinse each one separately. Put the filter back together and dry the separate parts with a towel.
Mix a package of descaler with the water in the water container every four to six months to rid the coffee machine of mineral deposits. Plug in the coffee machine, and select "On." Select the "Hot Water" button, and position the steam valve over the drip tray. Dispense two thirds of the descaler and water into a container in 15 minute intervals by turning the steam valve counterclockwise to dispense and clockwise to shut off the flow.
Let the coffee machine heat up fully, and then dispense the remaining descaler and water by turning the steam valve counterclockwise to empty the water container. Press "Off" to turn the machine off.
If this does not work then you might require a technician.
The coffee maker has three contributory factors for brewing experiences. First, putting enough water in container prior to brewing is expected to dispense in to coffee capture cup. Second, installing the component parts after inserting coffee leaflets should not hinder brew seepage into the cup. Third, allowing enough time for the brew to dispense is a requisite means to coffee impressions. Furth, coffee leaflets require appropiate numbers inserted at the container area lest the machine takes time to sock and dispense. However, refer to the device user guide for appropiate manufacturers instructures to user as expectations during brewing. Also, refer to the user guide to ascertain any conditions that may be signs of damage preventing fast brewing.
That is exactly what I would've suggested, the brew unit is clogged. remove brew unit and try to blow through the top, if you get through then check the bottom. One of the chambers must be clogged. Another question is the coffee extract wet or dry grounds? If wet then the block is on the top, if dry it ids on the bottom.
I was having this trouble with Lavazza beans and Morrisons (horrible) beans. I switched to Formula 6 from James' Gourmet Coffee on the internet and every cup has a great crema layer and good taste.
With the old beans I could get an occasional good cup, it seemed this was more of a problem if the machine had been switched on for a long time before making the cup. I use a Gaggia machine with a Gaggia MDF grinder on 8 or 9 setting, with the new beans I now get a great cup all the time so I'm going to try more the James' range!