Boiler Problems – Boiler Noise, Leaking, Knocking, Grinding, Clicking, Low Pressure

By Rob Hull on July 23, 2010

Although a well-fitted, modern and reliably-sourced boiler from a reputable company or supplier is less likely to cause issues than an older, cheaper boiler, all boilers generally suffer from a variety of similar ailments when they do develop problems.

Lack of an annual boiler service, as well as severe conditions or stress the boiler is put under will increase the likelihood of your boiler developing common boiler problems other than the usual wear and tear over time resulting in loss of hot water and/or heating.

Common Boiler Issues

There are a few common boiler problems that boilers may experience – some can be fixed by yourself at home without the need of an engineer or any special tools, while others may need parts or adjustment that can only be made by a qualified engineer.

Most issues a boiler may have are difficult to possible to diagnose with a glance, with problems such as poor heat maintenance, noise and unreliability being the only signals that there could be something wrong. A good way of checking if your boiler has any issues that are currently small is by taking a look at the water pressure on the boiler.

Loss of Pressure – Your boiler will work at its optimum level only if the water pressure is made constant. Most modern combination boilers will be pressurised with the water entering its system from the mains cold though a device called the ‘filling loop’. Any loss of pressure in a modern combination boiler therefore can be fixed by adding water through the filling loop to the system.

Water Leaks – Water leaks can be very small at first, and cause a loss of pressure in your boiler. Checking the pressure on your boilers pressure gauge is a good idea to keep abreast of any possible water leaks in the system – as small leaks often evaporate quickly and are therefore hard to find, but can develop into larger leaks. The correct pressure of your boiler should be between the 1 and 1.5 level, it should never drop below 0.5 or be found rising about 2.5. Topping up the filling loop, which should be close to the boiler itself will re-pressurise the system again if it drops too low.

Blockages – These can be detected by a loss of heat or water through parts of the system, or by an abnormal pressure reading on the boiler itself. Fixing these should not be attempted by someone without a Gas Safe Registration or with respect to condensing boilers without the necessary experience.

Repairing Common Boiler Problems

If your boiler develops a fault that you feel you cannot repair or want to be safe and have someone take a look at it, then the first thing you should do it contact a qualified heating engineer. Once you have established the exact problem with your boiler, it may be wise to shop around reputable engineers for a quote and parts to repair it.

When choosing an engineer, as well as it being vital that they are Gas Safe Registered, be sure they have plenty of experience in repairing your type of boiler (look up the make and model number of your boiler and ask engineers if they have worked on the common boiler problem your boiler is experiencing before) as well as doing some research either among friends or on-line on the reputation of the engineers in your area.

"I found your help in sourcing a new boiler excellent. I was contacted immediately by two of the contacts suggested by you and was able to arrange to have the new boiler fitted at a very fair price within three days of contacting you. Thank you for helping me to resolve a very pressing problem so efficiently".
J Drew, Hants
Get a quote
 

 

Save up to £300 per year!

Save up to £235 per year with a new condensing boilerDid you know new style condensing boilers recycle heat that would have otherwise been lost? this could save you up to £300 per year!

This not only helps you reduce your bills but also the environment by lowering your Co2 emissions. You can request quotes for a new high efficiency boiler here.

 

 

Ask a question

Got a question about a new boiler, your current heating system or a renewable energy solution?

Consult a wealth of knowledge from the impartial plumbers and heating engineers using our categorised discussion forums.

 

 

Boiler servicing can save lives

Regular servicing ensures your boiler is running at peak efficiency saving fuel and money but more importantly it could also spot the escape of potentially lethal carbon monoxide, which could just save your life.

Servicing typically costs between £50-£80 so what are you waiting for?

Every year Boiler Guide helps thousands of homeowners find reputable and rated heating engineers for new boiler replacements and service jobs. Here are just some of the recent boiler quote requests we received and sucessfully completed:

New & Replacement LPG Boilers

Get a Quote
BT42 - TOOK OUT OLD BOILER YRS AGO WHEN I GOT THE OIL INSTALLED. WANT A PRICE TO FIT A NEW BOILER AND CIRCULATION PUMP.

New & Replacement Gas Boiler Installation (ECO grant funded)

B67 - Benefits: child tax credit, household income: £0 Current boiler: Worcester 24CDi RSF Serial ASB, efficiency: 78.1%, 14 years old and working, located in downstairs bathroom WM. Faults: Looses pressure.
(house) NG6 - Current boiler is approx 10 years old, located in the kitchen, C&M Britony combi SE (all copper pipes) Faults:The pressure drops. Benefits: childtaxcredit,workingtaxcredit-under16 House hold income is below £15,860. Contact:Anytime.
LE2 - Current boiler: Chaffotaeux et Maurey, Brittany. 10yrs plus. Leaks water, hot water goes cold Benefits: jobseekers-disabilitypremium. Call anytime
NE37 - Current boiler is a ravenheat silverstar - water pressure goes down, every time we use it we have to turn pressure up Benefits: income related employmentsupport-workrelated/AVANTA group.
Middleton M24 - Current boiler: Myson Apollo. 20yrs plus. pressure build up causing banging in the boiler. Benefits: workingtaxcredit-age60. Earns: £7K Call anytime
Tonna SA11 - Crrent boiler: Ferroli Optima 701. its roughly 18 years old, it leaks and water pressure and heat is terrible Benefits: childtaxcredit,workingtaxcredit-under16. Earns: £6K Call anytime after 1pm
LL31 - Current boiler: Worcester 24cdi. 17yrs. erratic pressure Benefits: pensioncredit. Call anytime after 10am.
LE5 - Current Boiler: Vaillant turbo max. 9 years old. Located in the dining room. Faults: problem with the pressure. Benefits: income based employment suppport allowance - support group.
ST5 - Current boiler is gloworm 30ci .needs pressure adjusting every day water coming out of drainpipe. Benefits: pensioncredit. Call anytime.
Preston TQ3 - current boiler is a gloworm hideaway 40/50B over 15 yrs. FLOORSTANDING. Benefits: workingtaxcredit-age60 - Earns less than 10k pa. Call evening.
CF3 - Benefits: childtaxcredit
NE9 - Current boiler is approx 9 years old, located, Worcester 28 i, located upstairs bedroom. Faults: problem with pressure. Benefits: pensioncredit Contact: anytime
M18 - current boiler is a ariston over 10 yrs old - all copper pipes. over 10 yrs old. its not working properly.There is some leaks and i believe it might brake very soon.we've recently move to this house and i'm not sure how long this fault was on. Benefits: childtaxcredit,workingtaxcredit-under16 earns 8k pa. Call anytime.
G41 - Current boiler: Potterton Puma 80e. 10yrs plus. The pressure always messes up and the lockout button always comes on, it makes loud noises and sometimes when i turn the water on it splirts out and my hot water stops working. Benefits: childtaxcredit,incomesupport-under16,incomesupport-under20. Earns: No one working.
EN6 - current boiler is a gloworm micron over 10 yrs old. none Benefits: childtaxcredit - approx less than £15,860k pa. Call EVENINGS
Chadderton OL9 - Current boiler is approx 12 years old, Raven heat little star, located in the kitchen. It leaks water. Benefits: childtaxcredit,workingtaxcredit-under16 house hold income is below £15,860. Contact: anytime.

Maintenance/Repairs of Gas Central Heating Systems

Fulwood PR2 - The boiler in this house seems to work but it leaks underneath and the pressure sometimes drops. Its a Baxi Boiler. Thanks

New & Replacement Gas Boilers

SW11 - Current boiler: 8yrs. Has problems. Leaks. Keep in same place. Call anytime. Replace ASAP. Appointments: anytime
CR2 - Current boiler: Potterton Suprima 70. 10yrs. Does work but leaks. Replacement of exisitng boiler with new model. Keep in same place. Call anytime. Replace ASAP. Appointments: anytime
The UK's leading resource of boiler & central heating engineers

Need a new boiler?

  • Tell us your requirements
  • We find up to 3 registered traders to quote you
  • Compare prices and customer feedback
  • Select the best option for you
Do you qualify for a replacement boiler grant?
British Gas