📹 How to Resolve Heating / Steam / Hot Water Issues on the Expobar Brewtus IV

My steam boiler is not heating/ Not Steaming and no Hot Water At All

If you are experiencing issues with your Expobar Brewtus being unable to heat up, produce steam, or hot water, there may be something going on with the high limit switch. The instructions below will help you to diagnose the cause of the heating issue and also reset or replace your machine's high limit switch.

Confirm that water is coming through the group head when the lever is lifted, and that this has been isolated to a steam boiler issue. (You can still get water out of the group head without the boiler being full. We should be making sure the autofill function has successfully filled the boiler. Easiest way, remove the probe from the autofill and let it run for a few seconds, watching the level in the tank and see if it starts to drop. Put probe back on. Do not run this for too long or you will overfill the boiler and water will pour from the safety).

Is the steam boiler turned “ON”?

  • No. Turn on the steam switch, and wait half an hour to see if the steam boiler will heat.
  • Yes. Move on to the next question.

Is the red light coming on on the front of the machine?

  • No.
    • Is the machine plugged in and the power switch on?
      • Yes. Move on to the next question
        • No. Plug the machine in and turn the power switch on
          • Visually inspect the high limit switch.
            • Is it melted or broken? Replace it.
            • If it is not broken, unplug the machine, and reset it. (If your switch either needs to be reset or replaced, refer to the attached document at the bottom of this article for step-by-step instructions with photos).
              • Power the machine on see if it heats
                • Test the high limit switch for continuity.
 
  • Does it have continuity?

  • Yes. Move on to the next question.

  • No. Replace the high limit switch.

Is the solenoid valve (also called the auto fill valve) clicking, but not filling the boiler?
  • Clean the autofill valve.
EXPOBAR_BREWTUS_IV_Fill_Valve_Exploded.jpg
 

Test voltage out of control board to the pressure stat. Is there voltage?

  • No: Replace the board
  • Yes. Is there voltage coming OUT of the pressure stat to the heating element?
    • No. replace the pressure stat.

Replacing the Pressure Stat on your Expobar

To replace the pressure stat on your Expobar, you will need to remove the housing and locate the stat. The installation is quite simple and will only require a few tools. Refer to the article on housing removal before continuing. The instructions attached below outline the process of replacing the pressure stat on your machine, including photos of components and a breakdown of the tools needed to complete the procedure.
 
If there is voltage coming out of the pressure stat to the heating element:
  • Yes
    • Power down the machine and unplug it. Remove the access panel to the rear boiler on the bottom of the machine. Remove the electrical leads to the heating element. Test the heating element for continuity.
      Is there continuity?
  •  No. Replace the heating element. It is highly suggested that if the machine has a bad heating element that the machine be sent in for repair. Replacement of this element is complex and requires an impact gun. We suggest reviewing the instructions attached below before purchasing an element. Also take note that a bad element can still have continuity so an element should not be dismissed if it has continuity. However in most cases when the red light is on and the machine is not heating, the element will be completely fractured and display no continuity.
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