I had almost the exact same thing. The fuse for your frother is out. If both the frother and the brew head won't heat, then it is your Thermal Fuse. There are two different fuses inside the machine. Take the top off, and find both fuses. Take a piece of wire and connect it to each end of the fuse. Now turn the power on. If it heats, then that is the fuse. If no results, try the other fuse. Either fuse should be cheap. My thermal fuse was $1.98. Good luck!
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Did your User Manual have a section that tells you how to clean out mineral deposits and hard water scale? Usually, this is done by filling the resevoir with white vinegar and then turning the machine ON for 30 seconds then OFF for 5 minutes. Keep repeating the ON-OFF cleaning cycle until all the vinegar is pumped into the carafe. If the machine needs further cleaning. Repeat the process until the scale and mineral deposits are dissolved. Finally, flush the machine with a full resevoir of clean water and run a normal BREW cycle. Should work like new.
If heater not working properly ,but still working the heat transfer poor ,probably need to disassemble and actually manually clean heater unit with wire brush till really clean,otherwise replace heater unit as heaters are usually fully sealed. get on line and search for Delonghi magnifica 3300 (parts diagram , replacement parts,parts). then you will have part no and hopefully someone who can supply parts.As for frother if water not heating to enough to make hot coffee the not heating enough to make steam either so frother does not work,if blocked then need to clean out frother tube.
Remove the frother nozzle: if its the early type with three hooks, slide the frother body down before trying to remove it. Disassemble the frother and clean the three holes in the end. If the holes are blocked, the steam can't escape. If it's not pushing hot water through the coffee holder, pull out the water reservoir, and remove and clean the grid plate assembly where the coffee holder clips in.
it is clogged with dried milk. Remove the frothing wand from the machine. now press milk froth. you should get a ton of steam blowing out of the hole where the frother used to be. Your frother comes apart for cleaning. pull the chrome tip off, pull the 90 degree fitting and the black milk suction tube off, if it is really dirty you can soak the disassembled frother in hot water with a cleaning tablet. ( the small ones you drop in the brew unit, not the big descaling tab.) also, there is a clear tube with a point on the end of it sticking out of the frothing wand. this is an air admittance oriface. it allows air to enter the hot milk stream and make it frothy and bubbly. if it gets clogged, you will get hot milk but no froth. Your machine came with a spare one in the parts kit.
I had the same problem. All you need to do is take the steam nozzle apart and clean it. I tip can be cleand with a neadle. Just make sure you unblock the little side holes and make sure to thoroughly clean the little hole in the front. Over time the milk builds up in the nozzle, clogging up the "steam holes", so the preassure gets too big and the rubber attachments can't hold it any longer. Hope that helps.
Just fixed this same problem by taking apart the water solenoid valve and cleaning out its connection tube of deposits that was blocking water/steam flow. I removed the magnetic coil but that's not required. The connector was very tight because it had loctite sealer on the threads. I used plumbers teflon tape on the threads when reassembling.
The stainless steel cover has a very small hole near the top. The hole allows a venturi action - meaning air molecules are entrained with the steam flow to increase the affect. Milk will clog the hole, but warm water and a guitar string, cheese wire, even a staple - something thin - will work to clean it out.
After frothing either clean the entire stainless steel piece or at least occlude the end at the same time as shooting through some steam. I usually use a kitchen sponge with the abrasive pad attached. The pad helps insulate the heat and provides the necessary resistance to force any milk out the small hole.
Yes, I hate living with this also. In fact I am considering machining a different steam tube assembly.