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.

Vaillant F.20 Fault Code: Overheat Safety Switch-Off Guide

The F.20 fault code on a Vaillant boiler means the boiler has shut down for safety because the temperature limiter has tripped — the boiler was getting too hot.

What the F.20 fault code means

The F.20 code is an overheat safety switch-off. The boiler has a safety device called a temperature limiter 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

Incorrect earth connection between cable harness and product
Flow or return NTC defective (loose connection)
Black discharge via ignition cable, ignition plug or ignition electrode

The underlying issue is usually poor circulation — the pump isn't moving water through the heat exchanger fast enough, or there's a blockage.

Can you fix it yourself?

Do not keep resetting the boiler — the temperature limiter is a safety device. If it has tripped, the boiler was overheating, and repeatedly resetting it could cause serious damage.

There are a few things you can check:

Check the system pressure — Make sure it's between 1.0 and 1.5 bar.
Bleed your radiators — Trapped air can cause poor circulation and overheating.
Check that all radiator valves are open — Closed valves can restrict flow.

If the F.20 code returns after resetting, you need a Gas Safe registered engineer. The engineer will check the pump, heat exchanger, and temperature sensors.