Profitec Pro 300: Cleaning the Fill Probe

If your boiler is over-filling, or if you would just like to perform some recommended maintenance on your Pro 300, here are the directions on how to remove and clean your fill probe/replace it

What you'll need:

• 2.5mm allen key
• 3mm allen key
• 13mm wrench
• Pliers
• Scotch-Brite pad
• Cafiza/espresso cleaning solution
• PTFE tape

NOTE: Drain the machine's boilers before attempting this procedure; then unplug the machine and allow it to cool down.

1. Start by removing the panels from the machine.

2. Locate the fill probe, and disconnect the electrical lead the top (red wire). 


3. Use the 13mm wrench to loosen the top nut portion of the probe connection.(You may need to remove the surrounding components to have room to work.)


4. Pull the probe up and out. 


If the probe does not slide out, use a 19mm wrench or deep socket to unscrew the bottom nut and remove the whole fill probe assembly.



5. Use a scouring pad or wire brush and a mixture of hot water and Cafiza to scrub off any scale/mineral buildup. If your paper washer looks like the one pictured below, you will need to clean it off and wrap the threads with some PTFE tape to create a seal.

6. Reinsert the probe or reinstall the whole probe assembly into the boiler and reattach the electrical lead. 


7. Plug the machine back in and power it on to test for leaks before reinstalling the side panels.