Which boiler repair

Firstly, there could be air in the radiator, which can be released by using a bleed key. Radiator valves also could be a cause, which would need replacing. Kettling is where limescale builds up and causes issues to the boiler system and damage to the heat exchanger.

Banging noises indicate that something is passing through the system, knocking as it goes along. This could range from debris, sludge and even air. Furthermore, scale build up and low water pressure can create banging and rattling noises. The pilot light indicates that the boiler has fired up and trying to heat the water being passed through it. Draughts can also blow the flame out if there is a break in the air seal. Lastly, there could be debris that is stopping the pilot light from firing properly and will need to be cleaned.

The majority of the time, if your boiler is losing pressure then it is from a leak in the central heating system. Beyond that, there could be an issue with the pressure relief valve or the expansion vessel. If your heating system makes use of a condensate pipe that draws water away from the boiler, this can sometimes freeze.

If this happens, often a blockage will occur and the boiler will fail. As a thermostat gets older it can begin to fail and provide inaccurate temperature readings. Seals are the most common reasons for a boiler to have a leak. Over time they can get damaged and degrade, meaning water will eventually leak out — particularly under high pressure.

The boiler will switch itself off to avoid causing further damage and harm to the system, as well as other reasons. Low water pressure, air in the system, and a blocked condensate pipe can all cause this issue. The length of the repair is completely dependent on the issue. But it can really help if you describe exactly what is wrong when we initially communicate. Proof of insurance A reputable company should have liability insurance. Professional qualifications and accreditations You should check that the engineer is Gas Safe Registered and ask to see their card, this will prove that they have the right qualifications.

Get a free consultation on a new heating system. Find installer. Which heating system is the best for you? Product Finder Tool. Why is my radiator cold - common problems and how to fix them How to bleed a radiator: 8 steps to save you money What temperature should a condensing boiler be set at? What to do if your boiler pressure is too high Can you install a heat pump in an existing home?

What should I do if my boiler loses pressure? What to do if your boiler pressure is too low No hot water? How to connect a wireless thermostat to your boiler. What is a combi boiler? What is an expansion vessel? What will replace gas boilers in ? New boiler costs: a buying guide What temperature is a heat pump not effective? Electric boilers vs.

What is an air source heat pump? How long does a combi boiler last? Looking for a new heating system? Get a free quote from a local installer Find Installer. Recommended Topics. Why is my radiator cold - common problems and how to fix them. Customer Support. Social Media. Get your boiler serviced by a Which?

Trusted Trader. All Which? Trusted Traders have been vetted by a trading standards officer and passed through our own rigorous vetting procedures. Make sure you get the very best boiler service by reading our guide to getting the best boiler service. CO is a colourless, odourless gas that is produced by incomplete burning of carbon-based fuels, including gas.

CO stops the blood carrying oxygen around the body and can kill quickly. Symptoms include headaches, breathlessness, nausea, dizziness, loss of consciousness, drowsiness, vomiting, pains in the chest, stomach pains or visual problems. The best way to protest yourself from the dangers of carbon monoxide is to buy a Best Buy carbon monoxide detector that will alert you if a dangerous leak occurs.

An annual service is also essential to make sure that your boiler remains safe. Owners of old fashioned non-room sealed boilers and systems with hidden flues are particularly at risk from the dangers of carbon monoxide.

What to do when a carbon monoxide detector goes off - follow our six-point plan to keep yourself safe. If after reading this guide you decide you need a heating engineer to diagnose and fix your boiler problem, make sure you use a Which? You can also use our Trusted Traders search tool below to find a local trader in your area. You don't have to be a Which? Trusted Traders. Customer score.

SM Sam Morris. In this article Common boiler faults Boiler repair costs parts How much is a boiler service? Dangerous boiler faults Need a heating engineer to fix your boiler? If your boiler is beyond repair and you need a new one, use our boiler reviews to find a reliable replacement Common boiler faults The majority of serious boiler faults are hard for a layman to diagnose, and if you're not a trained heating professional you should never attempt any repairs that involve removing the boiler casing.

Frozen boiler condensate pipe. Show full table. Boiler maintenance Getting the best boiler service Common boiler problems and repair costs How to balance and bleed your radiators How to thaw a frozen boiler condensate pipe. Share on Facebook Share on Twitter Share by email. Latest News In Which?