EE1.7H2 SW3 Diagnostic Push Switch for Stannah Starla / Siena 600 ECU Board

Replacement DPDT push button switch (0.1 A, 32 V) for SW3 on Stannah Starla / Siena 600 main ECU—used to enter troubleshooting mode.

This component is a direct‑replacement pushbutton switch used on the main ECU (control board) of Stannah Starla and Siena 600 stairlifts. It replaces the board’s “SW3” switch, which technicians un-latch (de‑latch) during service to invoke a diagnostic mode that causes error codes to appear on the chair chassie (carriage) status display. The switch is a through‑hole DPDT (double‑pole, double-throw) push switch rated for 0.1 A at 32 V DC. Installing this part requires de‑soldering the existing SW3 switch and soldering in this one with correct orientation and alignment.

Specifications

• Switch type: Pushbutton (through‑hole)
• Circuit configuration: DPDT (On‑On)
• Current rating: 0.1 A (100 mA)
• Voltage rating (DC): 32 V
• Actuator travel force: ~1.7 N
• Operating temperature range: –40 °C to +85 °C
• Electrical life: 100,000 cycles
• Termination style: PC pins

This replacement switch is intended for use by qualified installers or service personnel. Correct installation ensures reliable diagnostic access while maintaining board integrity. Always verify solder joints and alignment, and follow applicable safety and service practices during installation.