What are Valliant boilers?

When it comes to Vaillant boilers, Frank Finn Plumbing is recognised as the experts in Walton-on-Thames. Our expert technicians often recommend Vaillant boilers for homes when a replacement boiler is required. Being a market leader, Vaillant is one of the better boiler brands to buy. Not just because they are well constructed, but because they also come with an exceptional 7-year warranty. The Combi System is the most widely recognised and used boiler in the UK, especially in Walton-on-Thames.

This is because they save space and donít need a storage tank or hot water cylinders. This is probably due to the little amount of space they take up and because they have no need for a hot water cylinder or a storage tank. Itís the best choice for buildings that require constant hot water, especially homeowners whoíd rather not rely on stored water in hot water cylinders. Vaillant boilers guarantee the safety and comfort of your household.

Because of their superb efficiency, Vaillant saves you a great deal in terms of energy costs and utility costs when compared to lesser models.


To ensure you get a suitable boiler for your central heating and hot water requirements, we recommend getting guidance from a certified professional here at Frank Finn Walton-on-Thames on 0208 408 0743.

When will you require assistance with your boiler?

Listed below are common Fault codes displayed on a boiler system;


Code F27: This shows a condensate pipe is likely frozen.

Code F22: This indicates a commonplace boiler fault – low water pressure.

Code F75: This means your boilerís sensor is unaware the boilerís pump has started running. Usually, occurs in older boilers that have had magnetic filters fitted or that have never been flushed.

Code F28: A faulty ignition or gas not being supplied to the boiler can bring about this error code.

Code F29: This means a snuffed boiler flame.

Odd noises coming from your boiler

Strange noises from your boiler– Air getting into your boiler system is the usual culprit.

Issues with thermostat

Thermostat fault – if the boiler’s thermostat is inaccurate or switches heating on and off intermittently, it’s time to get a new one.

Boiler keeps turning off

Boiler keeps going off – Low water pressure or lack of water flow due to a closed valve, air in the system, or problems with the thermostat or pump are the usual culprits for this fault.

Radiator not getting hot

Radiator not hot enough – Radiator not getting hot enough or only its bottom section heating up can be caused by an accumulation of sludge or air in the system, or an uneven distribution of heat.

No heat or hot water

Shortage of hot water or no heating – can be due to a faulty thermostat or motorised valve, a broken diaphragm or airlock, a broken valve or poor water level.

Boiler leakages

Leakages from the boiler – Do not attempt fixing a leaking gas boiler yourself unless you’re appropriately qualified, instead, summon a Gas Safe registered engineer to check on your leakage.

Blown out pilot light

Pilot light goes out – Can be caused by a broken thermocouple that’s stopping the gas supply, or you simply have no gas supply to your house. A blown out pilot light or accumulated dirt in the pilot light compartment are also possible causes.

Falling pressure

Dropping pressure – If your pressure gauge shows “below 1”, there might be an issue caused by reasons ranging from; a water leak in the system, pressure relief valve needing replacing or radiators being recently bled.

Anytime you request our expert services

Reach us on

How to maintain your Vaillant boiler?

Fixing your boiler by yourself can be risky. Do not risk fixing your boiler yourself if you are not a certified expert, instead, reach out to a professional Gas Safe engineer from Frank Finn to assist with your Vaillant boiler repairs in Walton-on-Thames.

Maintenance services for your boiler are also provided by our experts. In an effort to ensure you enjoy your Vaillant boiler for as long as possible, we recommend you have a maintenance service done on your boiler at least once every year to keep it safe and efficient.


Our engineers are also available to confirm or repair any of the following key components of your boiler by doing the following;

  • Bleeding the radiators.
  • Getting rid of sludge inside your boiler system’s radiators by power flushing it
  • Radiators that aren’t heating up will get faulty or broken valves replaced.
  • If the radiators in a larger home need balancing and fine-tuning, we can provide that.
  • The following safety checks on your boiler can also be carried out by us;
  • We’ll verify that all fans are properly working.
  • We’ll verify the integrity of all seals.
  • If necessary, we’ll use a flue gas analyser to verify your boiler is burning the appropriate combination of gas and air.
  • We’ll ensure no electrical connection is out of place or malfunctioning.
  • Ensure all electrodes are properly connected and functional.
  • Checking free flow in your boiler’s condensate trap and pipe.
  • Check all safety devices and ensure they are in good shape and activated.

I want to install a Vaillant boiler, what do I do?

Deciding what model to install for your first boiler or replacing a defective one can be hectic, especially when you don’t know enough to decide what model will best suit your needs.

In our years of experience at Frank Finn, we have had cause to deal with every design of Vaillant boiler and have come to know them intimately.

Our familiarity with these boilers and our experience is why you should get in touch with us at Frank Finn Plumbing by dialling 0208 408 0743 for your Vaillant boiler installation in Walton-on-Thames.

We have top men and women on the job that can offer quick, quality service around the clock and at a pocket-friendly price.

If you want to get your boiler serviced by a company that does the job the right way, contact Frank Finn now.