Following an emergency call-out to Pembroke Avenue, Enfield, EN1, TNG Services Ltd returned the next day to replace the customer’s Ideal Logic+ System 30 with an Ideal Logic Max System2 S30, a 30 kW system boiler.

The breakdown had left the property without heating or hot water, with water dripping from the existing boiler.

Why the existing boiler needed replacing

At the first visit, the boiler displayed an F1 fault and the heating system pressure gauge read zero. We found a hole in the deteriorated sump clean-out plug. After replacing the plug and drying the casing, we continued testing and found a second leak at the back of the pump casing, along with further internal damage from the original leak.

Given the age of the boiler, the extent of the damage and the additional leak, we assessed it as beyond economical repair. We also found that the diaphragm in the external expansion vessel in the loft had failed.

Read the original Enfield F1 breakdown investigation for the full diagnosis.

Next-day Ideal boiler replacement

After we explained the findings, the customer chose to replace the boiler. We returned the following day and installed the Ideal Logic Max System2 S30 in the kitchen unit.

The new 30 kW model is rated A for space heating. As a system boiler, it heats the property and supplies heat to a separate cylinder for stored hot water.

Replacing the external expansion vessel

Alongside the boiler, we replaced the failed external expansion vessel in the loft. The old vessel had filled with water after its diaphragm failed. The replacement accommodates the expansion of heating water as it warms up, helping to control pressure rises in the system.

What the upgrade means for the customer

• Multiple faults addressed: The new appliance replaces a boiler with two leaks and additional internal damage.
• A-rated space heating: Actual energy use depends on system setup and how the heating is used.
• Clear controls: The colour display and straightforward interface make settings and boiler information easier to read.
• Renewed pressure control: The replacement external vessel helps accommodate water expansion as temperatures rise.

Boiler replacement in Enfield and North London

Diagnosing the leaks and checking the external vessel helped the customer decide whether to repair or replace the boiler. In this case, TNG replaced both the boiler and the failed vessel.

TNG Services Ltd provides boiler fault finding, repairs and boiler installation and replacement across Enfield, North London and Hertfordshire. We also provide routine boiler servicing.