How can I troubleshoot a main boiler error 109 myself?

By: USER8667
29 Agustus 2025 Support 5 minutes
4.5
54 views 54 comments 7 shares

Question

Grade: Education Subject: Support
How can I troubleshoot a main boiler error 109 myself?
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Answer (54)

Best Answer
(280)
Begin by checking the water supply line for any kinks or blockages. Inspect the water valve for signs of damage. Ensure the boiler is adequately filled with water (check the expansion vessel). If these checks don't resolve the issue, it's best to call a qualified HVAC technician.
Answered on 29 Agustus 2025

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