F83
FAULT CODE
Heatline
No Water Detected / Dry Fire
High Severity
Engineer Required
The boiler has fired but no temperature rise was detected, indicating the system has no water or has a very severe airlock.
Step-by-Step Fix Guide
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Step 1
Check system pressure immediately
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Step 2
Do not repeatedly reset
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Step 3 Engineer only
Call a Gas Safe engineer to investigate the water circuit
Gas Safe Reminder
Work on gas appliances must be carried out by a Gas Safe registered engineer. The steps above cover safe checks a homeowner can perform - any internal component replacement requires a qualified professional. If in doubt, always call an engineer.