Quick Mill Arnos: Steam Boiler Not Heating, Not Steaming or Providing No Hot Water At All

How to resolve steam boiler and hot water issues on the Quick Mill Arnos.

Steam Boiler Not Heating, Not Steaming or Providing No Hot Water At All

If your Quick Mill Arnos’ boiler is not heating or you are not able to produce steam or hot water, there may be an issue with your machine’s high limit switch. Read on to learn how to determine if it needs to be reset or replaced. 

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 the 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 Power 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.
      • Power the machine on and 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.
• Yes.
  • Power down the machine and unplug it. Remove the housing of the machine. Remove the electrical leads to the heating element. Test the heating element for continuity.
    • Is there continuity?
      • No. You will need to replace the heating element. Take note that a bad element can still have continuity so an element should not be dismissed if it has continuity.