The Vaillant F27 fault code (shown as F.27 on some displays) is a flame detection error, so you may also see it called a boiler F27 error. The boiler thinks it can see a flame when it shouldn’t, or that the flame signal is wrong, so it shuts down as a safety measure. Vaillant lists […]
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Vaillant F28 Fault Code: Meaning, Causes & Safe Fixes
The Vaillant F28 fault code (shown as F.28 on some displays) means the boiler tried to light the burner at start-up but couldn’t get a flame, so it locked itself out. The cause is usually either a gas supply problem or an ignition problem inside the boiler. You can check the gas supply and, in […]
Central Heating Pump Replacement Cost
Discover the typical central heating pump replacement cost in the UK, including parts and labour. Learn what affects prices, when to repair vs replace, and get accurate cost estimates.
Boiler Not Working? Common Causes & Safe Fixes
Discover why is my boiler not working with our UK homeowner’s guide. Learn common causes from low pressure to frozen pipes, plus when to call a Gas Safe engineer.
Worcester Bosch EA 227 Fault Code: Causes & Safe Fixes
Worcester boiler EA 227 (often typed as EA227) means the boiler tried to ignite but didn’t detect a flame, so it locked out as a safety measure. You’ll usually have no heating or hot water. Common causes are a weak or interrupted gas supply, a blocked or frozen condensate pipe, a dirty or worn ignition […]
Air Source Heat Pump vs Ground Source Heat Pump
Air source heat pump vs ground source heat pump comes down to where the heat comes from. An air source unit takes it from the outside air, and a ground source unit takes it from the ground through buried pipework. Both then use it to heat your home and hot water. For most UK homes, […]
Vaillant F29 Fault Code: Meaning, Causes & Safe Fixes
The Vaillant F29 fault code (shown as F.29 on some displays) means the boiler lost its flame while it was running and couldn’t light again, so it locked out as a safety measure. You’ll usually have no heating or hot water until it’s cleared. Common causes are an interrupted gas supply, a blocked or frozen […]
Vaillant F22 Fault Code: Meaning, Causes & Safe Fixes
The Vaillant boiler F22 fault code (shown as F.22 on some displays) means the boiler has too little water in the heating system, or the water pressure is too low, so it has locked out to protect itself. You’ll usually have no heating or hot water until it’s fixed. The most common cause is lost […]
Boiler Pressure Too High: Causes, Risks & How to Fix It
Discover how to fix a boiler pressure that’s too high. Get tips on reducing combi boiler pressure without bleeding radiators.
How to Diagnose and Fix Ideal Boiler Ignition Lockout (L2)
Ideal boiler ignition lockout, shown on the display as an L2 fault code, means the boiler has failed to establish a flame and locked itself out. This is a safety shutdown. It stops the boiler pumping gas into the burner when nothing is burning it. You’ll have no heating and no hot water until it’s […]