My siemens iq300 is displaying E18, its brand new, but bought about 2yr ago, WM14Q391GB if its something simple! I've
Connection terminals - Data Sheet - DXR2.E12P-102A - DXR2.E12P-102A/BP - DXR2.E12P-102B - DXR2.E12PX-102A - DXR2.E12PX-102B - DXR2.E18-101A - DXR2. E18-101A/BP - DXR2.E18-101B - DXR2.E18-102A - DXR2.E18-102A/BP
![Siemens GCA135.1E Rotary Air Damper Actuator AC/DC 24V, 3-Position, 18 Nm, Spring Return 90/15 S, 2 Auxiliary Switches, Potentiometer for HVAC, Air Volume Control,: Amazon.com: Industrial & Scientific Siemens GCA135.1E Rotary Air Damper Actuator AC/DC 24V, 3-Position, 18 Nm, Spring Return 90/15 S, 2 Auxiliary Switches, Potentiometer for HVAC, Air Volume Control,: Amazon.com: Industrial & Scientific](https://m.media-amazon.com/images/I/51JQG4gZ3ML.jpg)