Wascomat Washer Error Code 29: Dryer Comm. Error
Code 29 means the Compass CPU board detected a communication error with the internal Selecta II CPU board. Check that the Selecta II display is lit. A technician should check the wiring, parameters 4:08 and 4:07, and the software in both boards.
Medium: the combined machine cannot coordinate its washer and dryer controls until the link is restored.
What does Wascomat error 029 / dryer comm. error mean?
Some Wascomat machines combine a Compass washer control with an internal dryer control based on the Selecta II CPU board. The two boards talk to each other. When the Compass CPU board detects a communication error with the Selecta II board, it shows ERROR 029 / DRYER COMM. ERROR. The link is internal to the machine, so the code does not describe a separate external dryer. The manual's advice is practical. Confirm that the Selecta II CPU display is lit, which shows that board has power. Check the wiring between them. Check parameter 4:08 equals 1, meaning 2400 baud, and parameter 4:07 equals 1. Update the software in both CPU boards, and if all that does not help, call service. A mismatch in settings or software versions can break the link even though both boards are healthy.
Affected models and control systems
Wascomat Compass Control washer-extractors W465H-W4300H, W475S-W4330S and W475N-W4330N that have an internal Selecta II CPU board.
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
- ERROR 029 / DRYER COMM. ERROR is shown on the display
- The dryer part of the machine does not respond to the washer control
- The Selecta II display is dark or shows something unexpected
- The code appears right after power-up
Possible causes
Likely causes — what usually sits behind error 029 / dryer comm. error on this control. A technician confirms which one it is before any part is replaced.
- A board connection loosened by vibration, breaking the link between the Compass and Selecta II boards
- Software versions in the two boards that no longer match after a replacement
Safe checks before calling for service
- Switch the machine off at the disconnect, wait about a minute, and switch it on again.
- Look at the Selecta II display, if you can see it, and note whether it is lit.
- Do not change any parameters or open panels.
- Write down whether the Selecta II display is on and the exact message, then call us.
How a technician diagnoses error 029 / dryer comm. error
- Read the code and confirm the Selecta II CPU display is lit.
- Inspect the wiring between the Compass CPU board and the Selecta II board.
- Check parameter 4:08 for 1 (2400 baud) and parameter 4:07 for 1.
- Compare the software versions in both CPU boards and update them if needed.
- Re-test communication after each change.
- Replace a board only if the link still fails after settings and software are correct.
- Parameters 4:07 and 4:08 are changed in the service program and need the correct values for the machine.
- Updating software on both CPU boards needs the right files and equipment.
- Board wiring checks happen inside the control cabinet with mains power nearby.
How error 029 / dryer comm. error differs from similar codes
This code is about the internal Selecta II CPU board, not a general external dryer link. Codes 73 to 88 on Selecta II dryer units are listed separately.
Technical reference
- Maker documentation
- Wascomat owner support
- Edition
- 438 9228-61/EN, 2011.08.25
- Models / control
- Compass Control W-series washer-extractor linked to a Compass dryer unit
- Section
- Troubleshooting, Description of error codes and causes (manual pp. 108-138)
- 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 Wascomat washer error codes
Does code 29 mean my dryer is broken?
Not necessarily. It means the Compass board lost communication with the internal Selecta II board.
Can I fix it by changing parameters?
The settings need to be right, but only a technician should check and change them.
Will an update help?
The manual lists a software update of both boards as a step, and mismatched versions can break communication.
Need help with Wascomat error 029 / dryer comm. error?
A technician confirms the cause on site and gives you the price in writing before any work starts.