Question 1

What is a powerflush and do I need one?

Accepted Answer

A powerflush forces a cleaning fluid through your central heating system at high velocity to remove built-up sludge, rust and debris from radiators and pipework. If some radiators run cold, or your boiler is making banging or kettling noises, a powerflush is often the recommended first step before considering any other work.

Question 2

What does a magnetic filter do?

Accepted Answer

A magnetic filter sits on the pipework near your boiler and continuously traps metallic sludge and debris circulating in the system, protecting the boiler heat exchanger from damage. Most boiler manufacturers now recommend or require one to keep the warranty valid.

Question 3

Why are my radiators cold at the top but hot at the bottom?

Accepted Answer

This is a classic sign of trapped air, and is usually fixed by bleeding the radiator. If it recurs regularly, it can point to a wider system issue that is worth having checked.

Question 4

Why are my radiators cold at the bottom but hot at the top?

Accepted Answer

This usually indicates sludge or debris has settled at the bottom of the radiator, restricting water flow. A powerflush is typically the right fix rather than repeatedly bleeding the radiator, which will not resolve a sludge build-up.

Question 5

Can you add a new radiator to an existing system?

Accepted Answer

Yes, we can add radiators to extend heating into conservatories, extensions or previously unheated rooms, and will check your boiler and system have the capacity to support the addition properly.

Question 6

What are TRVs and why would I want them?

Accepted Answer

Thermostatic radiator valves let you set an individual temperature for each radiator, so you are not heating rooms you are not using to the same level as the rest of the house. They are a simple, relatively low-cost way to improve comfort and control running costs.

Question 7

How do I bleed a radiator myself safely?

Accepted Answer

Turn off your heating first, then use a radiator key to slowly open the bleed valve at the top corner until water (not air) flows out steadily, then close it. If you are not confident doing this, or it does not solve cold spots, get in touch and we will take a look.

Question 8

Do you fit smart thermostats or heating controls?

Accepted Answer

Yes, we can fit and set up modern heating controls and thermostats compatible with your boiler, giving you better room-by-room control and scheduling.

Question 9

Will a powerflush damage an older system?

Accepted Answer

A powerflush is a standard, well-established maintenance procedure, but on a very old or already fragile system there is a small risk of exposing existing weak points. We will always assess your system first and be upfront if we think a gentler approach is more appropriate.

Question 10

How much does a powerflush typically cost?

Accepted Answer

The cost depends on the number of radiators and the size of your system. We provide a fixed quote after assessing your property, so you know the full cost before any work begins.

Central Heating Systems in Colne, Lancashire

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How It Works

System check

Powerflush or filter fit

Balancing and TRVs

Test and handover

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