Zone Valve Failure: What to Look Out For

Boiler zone valves are a crucial part of many boiler systems, but many homeowners are actually unaware of what to look for if one might have failed.

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Boiler zone valves are a crucial part of many boiler systems, but many homeowners are actually unaware of what to look for if one might have failed.

Understanding how to spot zone valve failure is key for keeping your heating system intact and preventing expensive boiler repairs in the long run.

What is a boiler zone valve?

A boiler zone valve is a device that controls the flow of water and steam in a boiler to specific ‘zones’ of a building.

1. The boiler zone valve works by opening and closing to allow hot water to flow to different parts of your home:

2. When the thermostat drops to a certain temperature the valve opens, allowing hot water to flow to the radiator tubes.

3. When the room is warm enough, the zone valve closes and stops the flow of water.

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How do you know if your boiler zone valve is faulty?

If your room doesn’t seem to be heating efficiently, this could be due to a faulty boiler zone valve.

There are a few signs to look for to establish whether your boiler zone valve is faulty, including:

No heat - The most obvious sign of a faulty or broken zone valve is that the room won’t heat up at all. If your room is not heating up, despite the thermostat being at a certain temperature, this could be a sign that the zone valve is failing to open correctly.
Uneven heating - You may also notice that some areas in your home feel warmer than others. Zone valves can get stuck in an open position, just as they can in a closed position. This can cause too much hot water through, causing one room to be much warmer than others.
Leaking valves - Damaged zone valves can sometimes leak. These leaks are often challenging to repair and you may be better off getting the whole boiler zone valve replaced.
Banging or hammering - Changes in pressure can cause boiler zone valves to make loud banging and hammering sounds when you turn the thermostat on or off. The heating system may still work, but ignoring the noise can cause a risk of leaking.

What to do if your boiler one valve fails

If you think one of your boiler valves has failed, the best thing to do is call a specialist heating engineer. Problems with heating elements can quickly escalate to other issues, which is why it is always best to get it fixed sooner rather than later.

The issue may not even be related to the boiler zone valve, and you may in fact have issues relating to your thermostat. This is again another reason why it is best to get an expert option on the issue.

Boiler zone valve repair

At Lacey Plumbing & Heating, we have years of experience helping homeowners with their boiler care needs, including boiler zone valve repair and replacement and you can experience expert solution focused plumbing and heating services tailored to your needs.

If you think your boiler zone valve is faulty or needs to be replaced, get in touch with our professional and friendly team today to find out more.