What tools might a heating engineer use to diagnose Error 118 on an Eco Compact boiler?

By: USER4861
29 Agustus 2025 Support 5 minutes
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Grade: Education Subject: Support
What tools might a heating engineer use to diagnose Error 118 on an Eco Compact boiler?
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A heating engineer will typically use a flue gas analyser to measure the composition of the flue gases and confirm if combustion is occurring correctly. They'll also use a multimeter to check the flue sensor's resistance and wiring continuity, and potentially a smoke pellet to visually confirm flue draft.
Answered on 29 Agustus 2025

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