Is Your Boiler Ready for a London Winter? How to Stop Limescale Before It Stops Your Heat

London is famous for its history, but its hard water is a nightmare for your heating. Over 60% of boiler breakdowns in the winter are caused by internal blockages and seized parts. At Back to Back, we believe in Smart Diagnostics to prevent issues before they start. Here is your zero-risk guide to ensuring your system survives the frost.

1. The “Septemper Shake-up” (Pump Circulation)

Boilers often seize in October because they’ve been dormant all summer.

• The Check: Turn your room thermostat to 25°C for exactly 15 minutes once a month during the off-season.
• Why it works: This forces the circulating pump and diverter valve to move, preventing limescale crystals from locking the mechanical parts.
• Zero-Risk Tip: If the system makes a “grinding” noise during this test, it’s a sign that sediment is already present and needs a professional flush.

2. Bleeding Radiators for Efficiency

Air in your system makes your boiler work 20% harder, increasing your London energy bills.

• The Check: Feel your radiators when the heating is on. If the bottom is hot but the top is cold, there is trapped air.
• The DIY Fix: Use a radiator key to release the air until water appears.
• The Critical Step: Always check your boiler pressure after bleeding radiators, as it will likely drop and need topping up to 1.0 – 1.5 bar.

3. Condensate Pipe Protection

In extreme London freezes, the external condensate pipe can freeze, causing an instant boiler shutdown (Error codes like EA or E1).

• The Check: Locate the plastic pipe leading from your boiler to an outside drain.
• The Prevention: Ensure it is properly insulated with “armacell” foam or, in a freeze, safely pour warm (not boiling) water over the pipe.

Total Winter Protection for £0.99/Day

Don’t get left in the cold. Our Smart Maintenance Plans include an Annual Service and priority emergency response, ensuring London’s hard water never wins.

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