Radiator Repair and Replacement in Birmingham

Most radiator problems fall into a handful of patterns, and the pattern tells us where to look.

• Cold at the top, warm at the bottom: trapped air. Bleeding usually fixes it, but if it keeps coming back, something is drawing air in or producing gas through corrosion.
• Warm at the top, cold at the bottom: sludge settled in the lower channels.
• Completely cold, while others are hot: a stuck TRV pin, a closed lockshield, or a blockage in the tails.
• Cold radiators upstairs only: on open vented systems, often low water in the feed tank or a pump problem.
• Water on the floor: a leaking valve gland, a tail joint, a bleed valve or a corroded panel.

We check the easy explanations first. There is no point replacing a radiator when turning a lockshield valve would have brought it back to life.

A lot of radiator repairs are really valve repairs. Each radiator normally has two valves: one controls it (a TRV or a manual wheelhead), the other, the lockshield, sets how much water it receives compared with the rest of the system.

Thermostatic radiator valves

TRV pins often stick after a summer switched off. Sometimes freeing the pin is enough; sometimes the valve body or head needs changing. Replacing an old manual valve with a TRV gives you control room by room.

Leaking valves and balancing

Weeping valve glands can often be repacked or tightened, but corroded valve bodies need replacing, which means draining down at least part of the system. Once valves are sorted, we balance the lockshields so radiators far from the boiler get their share of heat rather than the nearest ones taking it all.

Radiator replacement is the right answer when a panel is leaking through corrosion, when rust is showing along the seams, or when an old radiator is simply too small for the room. It is also common when people redecorate and want a different style.

The new radiator should be chosen by heat output, not just by size. We work out what the room needs, taking into account the walls, windows and how the room is used, then find a radiator that delivers it in the space available. A single panel may be swapped for a double panel convector of the same width to give more heat without taking up more wall.

• Matching pipe centres where possible to avoid moving pipework.
• New valves fitted with the radiator, rather than reusing tired old ones.
• The system drained, refilled and dosed with inhibitor afterwards.
• Bleeding and balancing once the new radiator is running.

Radiator installation is often part of changing a room: knocking through, fitting a kitchen, or adding an extension. Moving a radiator means extending or rerouting the flow and return pipes, usually under the floor.

In Victorian and Edwardian houses with suspended timber floors, such as many in Bournville and older parts of Kings Norton, pipework can usually run under the boards with minimal disruption. Solid floors are harder: pipes may need to come down from above, run along skirting, or be chased into the wall. In converted warehouse and loft apartments around the Jewellery Quarter, exposed pipework is sometimes left on show deliberately.

When adding radiators, we check the boiler has capacity for the extra load and that the pipework feeding that area is big enough. A radiator on the end of a long, narrow pipe run may never heat properly, however big it is.

Radiator fitting is not only about panels under windows. We fit most of the common types:

• Panel and convector radiators: single, double and triple, the standard choice for most rooms.
• Column radiators: steel or cast iron style, suited to period homes but heavy, so wall fixings matter.
• Vertical radiators: for rooms where wall space under windows is limited.
• Heated towel rails: plumbed into the heating, or dual fuel with an electric element so they work in summer.

Column and designer radiators often give less heat for their size than a plain double panel. That is fine if you size them correctly, but it is a common reason for new radiators leaving rooms colder than before. We check the heat output figures before you buy, so the style you like still keeps the room warm.

Sometimes one faulty radiator is really a symptom of the wider system. Signs that the issue goes beyond a single radiator:

• Several radiators cold at the bottom, or black water from every bleed valve.
• Radiators needing bleeding every few weeks.
• Pressure on a sealed system dropping without a visible leak.
• Rooms at the far end of the house never warming up, whatever the valve settings.

In those cases replacing radiators one at a time wastes money. The system may need cleaning, balancing, a new pump, or in some older homes a partial redesign by a central heating engineer. We will tell you when a radiator repair is the fix, and when it is only treating a symptom.