Do you offer an emergency plumber near me in Newbury?

Yes. If you are searching for an emergency plumber near me in Newbury or Berkshire, our Gas Safe registered engineers offer same-day and emergency callouts for plumbing emergencies and emergency boiler repair. Call 01635 74 50 40 and we will get to you fast.

Are you a local plumber or a national plumbing company?

We are a local Newbury plumbing and heating company, not one of the large plumbing companies. Choosing a local plumber means faster response times, fairer fixed prices, and central heating engineers who know your area.

What plumbing and heating services do you offer?

As well as boiler installation, boiler service and boiler repair, our plumbing services include gas boiler replacement, gas safety certificates, hob installation, leak detection, boiler cover and new gas pipe work. We are your one-stop heating engineer and plumber.

How much does a new boiler or boiler replacement cost?

New boiler installation and gas boiler replacement start from £1,595 with fixed, transparent pricing. The exact cost depends on your property size, boiler type and model. Get an instant fixed-price quote on our website.

Do you offer boiler cover or boiler maintenance plans?

Yes. Ask us about boiler cover and annual boiler maintenance to keep your gas boiler running efficiently and avoid costly breakdowns. Regular boiler service also protects your manufacturer warranty.

Glow-worm F.20 Fault Code: Safety Thermal Cut-Out Guide

The F.20 fault code on a Glow-worm boiler means the safety thermal cut-out has operated, shutting the boiler off because it was overheating.

What the F.20 fault code means

The F.20 code is an overheat safety shutdown. The boiler has a safety thermal cut-out that trips if the water inside the boiler gets too hot. When this trips, the boiler shuts down to prevent damage to the heat exchanger and other components.

Possible causes of the F.20 fault

System water pressure below normal range of 1 to 1.5 bar
Fault in the electrical connection for the flow and/or return temperature sensor
Flow and/or return temperature sensor defective
Circulation fault — pump, valve, or blockage
Water pressure sensor defective
Volume flow sensor defective
Ignition cable, ignition plug or ignition electrode issue

Can you fix it yourself?

Check the water pressure — Refill the system if needed (to 1–1.5 bar) using the filling loop.
Look for leaks — Check around radiators, valves, and visible pipes.
Ensure radiator valves are open — Closed valves restrict flow and can cause overheating.
Check external pumps and zone valves are working — If you have them.
Make sure there are no airlocks — Bleed your radiators.

If the fault persists after these checks, call a Gas Safe registered engineer. Do not keep resetting the boiler — the thermal cut-out is a safety device.