General Maintenance

ECM Synchronika: Expansion Valve Replacement (post-2021 machines)

Late model ECM Synchronika (and Pro 700) machines use a non-adjustable/non-serviceable expansion valve. This article demonstrates how to replace that valve when it reaches the end of its service life.

Tools Needed:
- 10mm crescent wrench
- 14mm crescent wrench
- PTFE tape
- Replacement expansion valve

NOTE: The machine must be unplugged and cool to the touch before beginning.

1. Start be removing the panels from the machine.

2. Identify the expansion valve in the machine.

3. Remove the flexible silicone drain tube from the expansion valve.

4. Use the 10mm wrench to hold the boiler plumbing steady.

5. Use the 14mm wrench to unscrew the old expansion valve. Hold the boiler plumbing steady.

6. Remove the old expansion valve. Remember to clean off any debris or old thread sealant from the T-fitting.

7. Seal the new expansion valve threads with a few wraps of PTFE tape.

8. Follow these instructions in reverse to install the new expansion valve.