Newco Coffee Brewer Error Code E5: Memory Communication Error
E5 means the brewer found a serial communication error with its non-volatile memory (EEPROM), and it falls back to default brew settings. The manual says to replace the main board.
Medium: the brewer can fall back to default settings but the memory link has failed.
- Code
- E5
- Maker
- Newco
- Equipment
- Coffee brewers
- Applies to
- Newco 20:1-LD, 20:1-AP, 20:1-TD, 20:1-LP3, 20:1-AP Pro, thermal models
What does Newco error code E5 mean?
The brewer stores its recipes and settings in a small memory chip called an EEPROM, which keeps them when the power is off. The control talks to this chip through a serial link. If the link fails, the control shows E5 (Comm Error). The manual states that the brewer then falls back to default brew settings, so it can still run with basic values. The cause the manual lists is a serial communication error to or from the non-volatile memory. The only action it gives is to replace the main board. This means the manual treats E5 as a board-level problem and does not list any cleaning, reset or wiring check for it. Any custom settings you had saved may not be in use while the error is active.
Affected models and control systems
Newco 20:1-LD, 20:1-AP, 20:1-TD, 20:1-LP3, 20:1-AP Pro and thermal models.
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
- E5 (Comm Error) on the display
- Brew settings not as you set them
- Brewer running on basic settings
Possible causes
Listed in Newco's documentation
- Serial communication error to/from non-volatile memory (EEPROM)
Other likely causes — what usually sits behind error code E5 on this control. A technician confirms which one it is before any part is replaced.
- Memory chip on the main board failed
- Board damage from a power surge or spike
- Moisture or spills reaching the main board
- Corrupted stored data after a power loss
Safe checks before calling for service
- Switch the brewer off and unplug it for one minute, then plug in and switch on.
- Check whether the brew volume and other settings are as you expect.
- Look at the base and back for spilled water, without opening panels.
- If E5 returns, call for service, since the manual lists a board replacement.
- Tell the technician whether any power outage or spill occurred before E5.
How a technician diagnoses error code E5
- Read the display and confirm E5.
- Check the board for moisture or visible damage.
- Check the supply to the board for stable voltage.
- Cycle power and see whether E5 returns.
- Replace the main board when the error persists, then reload settings.
- The main board is in a cabinet with live line-voltage wiring.
- A new board must be matched to the brewer model and its settings reloaded.
- Moisture damage must be traced before a new board is fitted.
How error code E5 differs from similar codes
E9 is also a communication error but between the display board and main board. E5 concerns the memory chip.
Technical reference
- Document
- 20:1 Coffee/Tea Brewer Operation and Service Manual
- Edition
- Man PN 121751 Rev 20260710
- Models / control
- Newco 20:1-LD, 20:1-AP, 20:1-TD, 20:1-LP3, 20:1-AP Pro, thermal models
- Section
- Error Messages, p. 6
- 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 Newco coffee brewer error codes
Is the brewer usable with E5?
The manual says it falls back to default brew settings, so it may brew, but with settings you did not choose.
Will a power cycle fix E5?
The manual lists only a main board replacement, so do not expect a reset to fix it.
What is the difference between E5 and E9?
E5 is a memory communication error. E9 is a communication error with the display board.
Need help with Newco error code E5?
A technician confirms the cause on site and gives you the price in writing before any work starts.