Schaerer Coffee Machine Message: Heating Water, Hot Water, Steam
Heating coffee water, Heating hot water or Heating steam on a Schaerer Coffee Art Plus Touch means the temperature is 10 C below the programmed temperature, so the machine waits. Wait until the temperature has been reached. If the message persists, call for service.
Low: a waiting message while the boiler heats; it clears by itself.
- Code
- Heating coffee water/hot water/steam
- Maker
- Schaerer
- Equipment
- Super-automatic coffee
- Applies to
- Schaerer Coffee Art Plus Touch, model 040381-00090EUS (SAP 1340900024)
What does Schaerer Heating coffee water/hot water/steam mean?
Each boiler has a programmed temperature, and the control compares the actual temperature with it. When the boiler is 10 C below the programmed value, the machine shows the heating message for that boiler and waits instead of making the drink, because coffee brewed with cool water tastes thin and steam from a cool boiler is wet. The message is a waiting state, not a failure. It is what you see after switch-on, after a long run of drinks that drew heat from the boiler, or after a lot of hot water was taken at once. The manual's only step is to wait until the temperature has been reached. If the message stays and the boiler does not come up, the heater or its control may be failing, which is when the manual says to call for service.
Affected models and control systems
Schaerer Coffee Art Plus Touch, model 040381-00090EUS (SAP 1340900024), from the 03.2021 v03 user manual.
Code numbers and their meaning can change between control generations. We match the full model and control before acting on a code.
What you may notice
- Heating coffee water, Heating hot water or Heating steam on the display
- Drinks waiting to be made
- Message after switch-on or a busy period
- Boiler slow to recover
Possible causes
Listed in Schaerer's documentation
- Temperature 10 C below the programmed temperature
Other likely causes — what usually sits behind Heating coffee water/hot water/steam on this control. A technician confirms which one it is before any part is replaced.
- Many drinks in quick succession drawing down the boiler
- Heating element slow or weak
- Scale on the element
- Low supply voltage slowing the heater
Safe checks before calling for service
- Wait for the machine to heat; the message goes away when the temperature is reached.
- Pause drink orders for a minute during a busy period.
- Check that the machine has been on long enough since switch-on.
- Note how long the heating takes.
- If the message persists, call for service and say which boiler is named.
How a technician diagnoses Heating coffee water/hot water/steam
- Read the message and history, and note how long the boiler takes to recover.
- Check the supply voltage while the heater is on.
- Check the heating element resistance and current.
- Check the heater relay.
- Compare the temperature reading with a thermometer.
- Replace the failed heater part.
- Heating elements run on line voltage.
- Boilers are pressurized and hot.
- Replacing an element means draining the boiler.
How Heating coffee water/hot water/steam differs from similar codes
The Timeout heater messages appear when a boiler has not reached its set temperature within 4 minutes of switch-on. This message is the shorter 10 C wait.
Technical reference
- Document
- Schaerer Coffee Art Plus Touch User Manual
- Maker documentation
- Schaerer owner support
- Edition
- User Manual | 03.2021 | v03 (Version 03 / March 2021)
- Models / control
- Schaerer Coffee Art Plus Touch, model 040381-00090EUS (SAP 1340900024)
- Section
- Error Messages, pp. 23-24
- Checked
- October 2026
We use the maker's document to read the code and do not reproduce it. Always confirm the complete model and control before applying these steps.
Related Schaerer super-automatic coffee error codes
Is the heating message an error?
No. It is a waiting state while the boiler heats.
How long should I wait?
Until the temperature has been reached. If it does not come up, call for service.
Is it the same as the heater timeout?
No. A heater timeout means 4 minutes passed without reaching the set temperature.
Need help with Schaerer Heating coffee water/hot water/steam?
A technician confirms the cause on site and gives you the price in writing before any work starts.