Machine working but not brewing coffee

Where is it leaking steam from? If it is from the porta-filter, you need to replace the group head gasket, which is done with something like a screwdriver to get it out.

It could be possible your water filter is in need of changing.

Are you leaving enough time for the water to heat up to a sufficient temperature? Typically 20 minutes is needed to ensure good steam flow.

Hi
If its pumping water its not the thermal fuse. Its probably the heating element. If it starts to build pressure but stops, its your vacuum breaker. It could also be your CPU is bad. Need a little more information to get a better handle on it.

Use a piece of hose, holding one end to youe ear and check all the fittings.

Expansion valve, coffee grind might be too fine.

Check with espresssoparts.com. They carry a wide assortment of parts.

You will need a food grade, high temperature epoxy. Different types are available at the big hardware stores. Don't use low temp or non food grade, you could end up in the hospitel. Don't use any type of silicon.

There are a bunch of appliance parts websites that heve the sealant you need. Just look under Espresso Machine parts. The brand isn't critical.

David-    While this may not be the answer you're hoping for, I have a suggestion. I own a FrancisFrancis X5 that seems to be operating slowly. I just ran some of the de-scaler through and now I can't get the water to express through an empty filter basket fast enough to empty the resevoir or to put out clear water. The de-scaler is blue and combined with the residual coffee and who-knows-what that's in the boiler, the water was coming through a putrid green. After several minutes of trying to fill and empty a shot glass (so I could monitor the color of the water being expressed) the machine simply stopped. I'm guessing a safety feature of the boiler may be when it over heats it shuts down.
   My suggestion: go to www.wholelattelove.com and buy an Expobar Office Pulser. It is the machine that I wish I had bought before all the hundreds and hundreds I spent on crappy machines. I do not work for Whole Latte Love or Expobar, but I have owned at least a dozen or more machines over the last 15 years or so and they all lacked some critical aspect of the expresso experience. My wife and I make lattes every morning (at least 4) and then more on the weekends and when we have guests. This Expobar has never failed me and we've owned it for more than two years. It's so good, I wish I could ship it to where we vacation and then back home, because NO ONE makes a latte better than I do with the Expobar. 

sounds like a leak..check the lines water may have shorted it out!