Delonghi troubleshooting I have had this espresso machine a couple of years, and it has now started dripping the coffee out really slowly making it weak, and no froth

If the air conditioner works and is blowing out super chilled air, then the dehumidifier function should work. The function takes in warm moist air and passes it over plates which are marginally colder than the ambient air. The air condenses and drips into a collection tank, or some have drain hose for putting into a floor drain.

After 8 years, it may need service and gassing up, but you may also have drier air than you think. Whether is works in AC Mode is the key.

Not sure. Might have a blown fuse or bad capacitor. Here are some DIY steps:

https://www.manualslib.com/manual/606569/Delonghi-Dehumidifier.html?page=7#manual

https://www.hunker.com/13408722/delonghi-dehumidifier-troubleshooting

https://www.veranda-interiors.com/dehumidifier-runs-but-wont-collect-water

https://www.delonghi.com/en-us/customer-service

Is there any water coming out of the group head when the porta filter is not used???the group head has a filter on it and it could be totally clogged

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It could be that the fan / fan motor has seized or jammed. Have a look through the vents and see if you can spin the fan. If not, you will need to strip the machine. Try lubricating the bushes / bearings. Often on these type of units, the vapours dry out the bushes and then they get tight and jam the fan.

Drips from where?
Find the source of the drip and seal it with rubber or waterproof tape.
If there is no pressure at the leak, this should cure it.
If you have trouble locating the leak, dry off everything and operate the
dehumidifier while you watch for the appearance of the moisture. Where
it first appears is probably the leaking location.

Think the problem is with a clogged tube running to the drain, rather than a faulty pump.

To test this theory, first turn the unit OFF & unplug it. Using an 18" long, appropriately sized, plastic Zip Tie. Carefully insert it into the drain hole tubing and continue to push it in unitil you reach a bend in the tubing. Gingerly work it past this bend until the Zip Tie bottoms out or your run out of usable Zip Tie. Then slowly pull it back out while rotating (twisting) it. This will help break up any clogs. As you reach the tip of the Zip Tie, be prepared as some water may follow. Plug the unit back in and turn the unit ON. Set the control to Pump Mode and monitor the drain for water flow.

I hope this helped you and thanks for choosing FixYa.

the motor is tight, (can't turn) lubricate the motor bearings with light machine oil. retest. rust causes this. the motor "tries" to turn, more power is needed, still can't turn, power exceeds safe limits: breaker trips.

Run a straightened coat hanger through hose or try to blow through. Or connect to faucet to clean out clog.
Make sure drip pan is clean & level. Basically vacuum any dust from inside drain area.

Is your pump hose connected tightly?