Eversys Coffee Machine Error Code S-001: Coffee Boiler Heating
S-001 means the coffee boilers are still heating after start-up or after the main switch was turned on. Wait until they reach their nominal temperature.
Low: a normal warm-up message; drinks resume once temperature is reached.
- Code
- S-001
- Maker
- Eversys
- Equipment
- Super-automatic coffee
- Applies to
- Eversys Cameo range (Cameo/Core, Classic, ST, in-box), e'Support article
What does Eversys error code S-001 mean?
After the Cameo is switched on, the control heats its coffee boilers to working temperature and holds drinks back until they are ready. While that is happening it shows "Coffee boiler is heating..." as S-001. The maker's table says to wait until the coffee boilers have reached their nominal temperature, and explains that both coffee boilers are heated after an initialization and when the machine has been switched on from the main isolator switch, once the cold flush has completed. The message therefore marks a normal warm-up. It lists no failure cause. If the warm-up seems to take much longer than it has before, the heating might have a problem, and a technician could test it, but the table gives no time limit.
Affected models and control systems
Eversys Cameo range (Cameo/Core, Classic, ST and in-box versions), as covered by the maker's e'Support table of S-number stop messages.
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
- S-001 after switching on
- Drinks cannot be made yet
- The boilers warm up and the message goes
Possible causes
Likely causes — what usually sits behind error code S-001 on this control. A technician confirms which one it is before any part is replaced.
- Coffee boilers heating to nominal temperature after initialization or after the main switch was turned on
- A heating element or sensor that is slow, which stretches the warm-up
- A cold kitchen that adds to the heating time
Safe checks before calling for service
- Wait for the message to clear.
- Do not turn the machine off during the warm-up.
- Note how long the warm-up took compared with normal.
- Report it if it stays after a long wait.
How a technician diagnoses error code S-001
- Time the heat-up and log the boiler temperatures.
- Check the heating element and its relay with a meter.
- Test the temperature sensor.
- Replace the element or sensor after tests.
- Boiler heating elements run on high-current wiring.
- Sensor and relay tests require the machine opened and live.
How error code S-001 differs from similar codes
S-000 comes just before this message, covering initialization, while S-001 covers the boiler warm-up.
Technical reference
- Document
- Operator stop messages for Cameo (S-XXX)
- Models / control
- Eversys Cameo range (Cameo/Core, Classic, ST, in-box), e'Support article
- Section
- Web page table of S-numbers, Infos messages and Explanations / Remedies (no page numbers)
- 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 Eversys super-automatic coffee error codes
How long should I wait?
The table says until the nominal temperature is reached and gives no time.
Is it normal after the main switch?
Yes. The table says both boilers heat after the main isolator switch is turned on, once the cold flush has completed.
What if it takes far too long?
Report it, since the heating or a sensor may be slow.
Need help with Eversys error code S-001?
A technician confirms the cause on site and gives you the price in writing before any work starts.