Repair of a gas boiler.

How does a combi boiler work?

A combined boiler is made up of a water heater and a central heating boiler in one small casing. If the room thermostat sends a signal to the boiler to fire up because the temperature has dropped below the specified point, the boiler will ignite so that heat may be transferred into the central heating system. When the thermostat setpoint is reached, the machine will ‘modulate,’ or decrease its output, maintaining proper temperature throughout the process while saving energy.

When a hot water tap is switched on, a valve within the boiler diverts the heat into the domestic hot water supply until the tap is shut off, when it returns to its normal position. The heat may be sent to either the central heating system or individual hot water taps, but never both at once.

Are combi boilers suitable for all homes?

Yes, combi boilers are suitable for most homes as long as there is enough space to store the boiler itself. If you have a small home or live in a flat, then a system or regular boiler might be a better option as they’re smaller in size.

Benefits of combi boilers

There are several benefits that come with having a combi boiler in your home such as:

Space Saving – Combi boilers don’t require a separate hot water cylinder so they can save valuable space in your home and also on installation costs as there is less pipework to connect.

Instant Hot Water – You won’t have to wait for hot water to come through the taps as it’s heated instantly.

Water and energy efficiency – Combi boilers only heat water when you need it so you’re not wasting energy heating water that you’re not using.

What are the most common faults with combi boilers?

There are a few common faults that can occur with combi boilers such as:

The boiler making strange noises – If your boiler starts making strange noises, it could be an indication that there is something wrong with the water pressure or the pump.

The boiler switching itself off – This could be due to low water pressure or a blockage in the system.

The boiler not igniting – This could be due to a problem with the gas supply or a faulty capacitor.

The boiler not heating water – This could be due to a problem with the thermostat or a broken diverter valve.

If you experience any of these problems, it’s important to contact a Gas Safe registered engineer as they will be able to diagnose and repair the problem.

At All Plumbing Services we offer a wide range of plumbing and heating services to both domestic and commercial customers in Newbury, Thatcham, Hungerford, Reading and surrounding areas. We have a team of Gas Safe registered engineers who are able to carry out installations and repairs on all types of boilers, including combi boilers. For more information or to book a repair, please contact us today on 01635 269888.