TNG Services Ltd attended an emergency call-out on Pembroke Avenue, Enfield, EN1, after a customer reported no heating, no hot water and water dripping from their boiler.
The appliance was an Ideal Logic+ System 30, installed inside a tall kitchen unit and displaying an F1 fault code.
What does the F1 fault code mean?
On the Ideal Logic+ System 30, F1 indicates low water pressure in the heating system. In this case the pressure gauge read zero, consistent with the fault and the boiler refusing to run. The code explained the shutdown, but further investigation was needed to establish where water was escaping.
Investigating the boiler leak
During our inspection, we found heavy staining and deterioration around the sump clean-out plug. The plug had developed a hole, allowing moisture to collect inside the boiler casing and drip out.
We replaced the damaged plug, dried the casing and reset the appliance before carrying out further tests.
Failed external expansion vessel
The filling loop and external expansion vessel were in the loft. During our checks, we found the vessel full of water. Its diaphragm had failed, and the vessel required replacement.
Repressurising the system revealed a second leak
We repressurised the system as part of the investigation. After a few minutes of testing, water began dripping inside the boiler again. We traced this second leak to the back of the pump casing.
Boiler assessed as beyond economical repair
Further inspection revealed additional internal damage caused by the failed sump clean-out plug. Taking into account the boiler’s age, the extent of the damage and the second leak, we assessed the appliance as beyond economical repair.
Next step: We explained the findings to the customer, who chose to proceed with a boiler replacement. The installation was arranged for the following day.
Why thorough investigation matters
Replacing the first leaking component did not resolve the breakdown. Further testing revealed another leak and helped us assess the boiler’s overall condition before advising the customer on the next step.
Boiler repairs and replacements in Enfield
TNG Services Ltd provides emergency boiler fault finding, repairs and replacements across Enfield, North London and Hertfordshire. Explore our boiler installation and replacement services or find out about routine boiler servicing.
Boiler leaking or showing an F1 fault?
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