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