Is a blocked flue the most common cause of Error 118 on an Eco Compact boiler?

By: USER8977
29 Agustus 2025 Support 5 minutes
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Grade: Education Subject: Support
Is a blocked flue the most common cause of Error 118 on an Eco Compact boiler?
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Yes, a blocked flue is the most frequent cause. Debris accumulation restricts the flow of exhaust gases, preventing the boiler from detecting proper combustion. However, a faulty flue sensor or wiring problems are also potential culprits, though less common.
Answered on 29 Agustus 2025

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