Boiler and Group Head Maintenance
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ECM Mechanika V Slim: Testing the High-limit Switches

Does the boiler on your Mechanika V Slim fail to heat? A tripped safety thermostat aka high-limit switch could be the culprit. Below are instructions for resetting the high-limit switch and testing for continuity.

Tools Needed:
- 2.5mm Allen key or hex driver
- Small flathead screwdriver
- Multimeter or simple continuity tester

1. Remove the cup warming tray and reservoir tank.

2. Remove the six screws holding the top panel in place, remove the top panel.
ECM_Mechanika_top_panel_screws

3. Identify the two high-limit switches on top of the steam boiler.
ECM_Mechanika_highlimit_01-1

4. Carefully use a finger or small flathead screwdriver to gently press down on the button in the center of each high-limit switch, making sure each is fully depressed. Feeling a slight "click" when pressing this button indicates that the switch was tripped.
ECM_Mechanika_highlimit_02

5. If the buttons don't appear to have tripped, but the steam boiler still fails to heat, test for continuity across the high-limit switches. Touch one probe from your multimeter or continuity tester to each of the two spade connectors on both high limit switches. A lack of continuity, even when the center button is fully depressed, indicates a faulty high-limit switch; replace as necessary. If both switches display continuity, then it's time to look elsewhere for the source of the fault.
ECM_Mechanika_highlimit_03