Northstar Plumbing and Heating

Radiator Installation & Repairs

Install, replace and repair radiators for efficient home heating performance.

Radiator Installation & Repairs in Darlington & the North East

Radiator Installation & Repairs


A radiator that never gets properly warm is often simply too small for the room, or is suffering from years of trapped air and sludge. We diagnose which it is before recommending a fix, rather than defaulting to a replacement.

Where a radiator has outgrown the room, or a valve is leaking and starting to mark the floor, we'll replace and correctly size it, matched to the room's heat loss rather than a like-for-like guess.

Radiator Installation & Repairs by Northstar Plumbing and Heating
What we do

Radiator Installation & Repairs: what is included


  • New radiator installation & replacement
  • Radiator repairs & valve replacement
  • Cold spot & circulation diagnosis
  • Correctly sized radiator upgrades
  • Bleeding, balancing & power flushing
  • Towel rail installation
What usually goes wrong

The problems we are asked to fix


Cold spots on a radiator

Usually air or sludge trapped inside rather than a fault with the radiator itself.

The fix  Bleeding and, where needed, a power flush to clear the system properly.

A leaking valve

Left alone, a dripping valve damages flooring and skirting over time.

The fix  Valve replacement, done cleanly with the system properly isolated first.

A room that never gets warm enough

The radiator may simply be too small for the room it's heating.

The fix  Correctly sized replacement radiators, matched to the room's actual heat loss.
How it works

From first call to finished job


Get in touch

Call, WhatsApp or use the form. Tell us what is happening and your postcode.

Free, honest quote

We explain the likely fix and cost before anything is agreed. No pressure.

The work

Carried out properly by a Gas Safe registered engineer, tidily and with respect for your home.

Signed off

Certified where the job needs it, and we only call it done when you are happy.

Customer reviews

What customers say

★★★★★

I would highly recommend. Liam provided an excellent service fitting a new shower. Professional and friendly service and a fabulous end result. Would definitely use again in future.

Claire Mcghee · Google review
★★★★★

Just had my work done and I'm over the moon with it, just what I asked for, done a lovely job, cleaned up and removed all mess, very pleasant and very reasonable price, will definitely get him again.

Google review
★★★★★

The job was done excellently, and he also took the time to point out other potential issues, helping to prevent future damage. His attention to detail and professionalism really stood out. He is very knowledgeable and does great work, highly recommended.

Google review

Read All Reviews

Free quote

Tell us about your radiator installation & repairs job

Fill in the form below and we'll get back to you quickly. Tell us what you need help with, along with your postcode, and we'll discuss the best solution for your home.

  • Free, no obligation quotes
  • Gas Safe registered engineers
  • Darlington, Durham, Teesside & North Yorkshire
  • Call or WhatsApp 07502 224800
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Request your free quote

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Questions

Radiator Installation & Repairs FAQs

How do I know if my radiator needs bleeding?

If it's warm at the bottom and cold at the top, that's usually trapped air. Bleeding is quick, but if it keeps happening it can point to a sludge problem worth a proper look.

Can you replace just one radiator?

Yes, we're happy to take on single radiator jobs as well as full system upgrades.

Free quotes across the North East

Need a reliable local boiler, heating or plumbing engineer?

From a new boiler installation to a heating breakdown, radiator replacement or plumbing repair, we provide reliable workmanship and straightforward advice from start to finish.

Or call 07502 224800