About Potterton

The Potterton combi boiler is a product of Potterton, a UK Company. They have been in business since 1850. More than seven million homes and properties use their boilers. The Company manufactures the boilers using the modern technology that saves energy. In addition, all parts and accessories are approved and genuine. Potterton ensures that the boilers attain a 100% pass in their testing program before releasing to the market.

Potterton Combi Boiler

These boilers are suitable for all sizes of homes and properties. The products are compliant to the Energy-related Products (ErP) directive. The Company has qualified technical and service team giving customers a lifetime after sales support. Upon request, the technical team works together with contractors and developers during construction.

potterton combi boiler

The Potterton Combi boiler can use gas or electricity. Furthermnore, the boilers are easy to install and long lasting. The flues are 20 meters long. This gives you the freedom to fit the boiler at any place. The sitting base is strong and solid. The combi boilers produce low noise and are friendly to the environment.

Potterton Combi Boiler Models

The boilers are in different models with quality and features you can trust. Some of the models are as follows:

Potterton Promax Combi

Potterton Promax Combi boilers are available in different ranges of 24kW, 28kW and 33kW. There is a suitable output for every property and home size. All the boilers have flue length of 20 meters. As as a result, this gives room for flexible installation. They have outstanding features, which include built-in frost protection. The Company has different models to choose from, going by your budget and size of property. The common features of Potterton Promax Combi boilers are:

  • Flue length of 20 meters for flexible installation, and sitting
  • Has a full modulating mode that allows the boiler to intelligently control and regulate heating. This saves on power bills
  • Can use Multifit Gas Saver to save on gas when heating water
  • Has hydraulic connections that make the boiler reliable
  • Simple to use controls that separate hot water and central heating
  • Available in outputs of 24kW, 28kW and 33kW
  • Nox Class 5 making the boiler environmental friendly
  • Standoff bracket that allows fixing of pipes behind the boiler
  • Pre-plumbing jig – allows property developers and contractors to install pipe work and fix boiler when the owner occupies the house

The following are some of the Potterton Promax Combi models:

Potterton Promax Combi 24kW

The Potterton Promax Combi 24kW is highly rated. It is suitable for smaller properties of two to three bedrooms. It is modern and compact and can fit well in a small cupboard. The boiler has new technology features including the following:


  • The warranty covers both labor and parts
  • Has a two-stage built-in frost protection
  • Ultra- low noise
  • Uses natural gas, LPG and electricity
  • Stainless steel heat exchanger
  • Energy saving mode
  • Wall mounting brackets
  • Fuel modulating for intelligent control of consumption

Potterton Promax Combi 28kW

The Potterton Promax Combi 28kW is suitable for smaller homes of between 2-5 bedrooms and 1 bathroom. The boiler is easy and flexible to install. The flue is ‘multifit’ giving you an option to install the boiler vertically or horizontally. The vertical installation an be up to the height of 20 meters. The flue is 20 meters long. You can maneuver with elbows and extension to install at a convenient position. The features of this boiler are:

  • Potterton’s ‘Multifit’ flue options
  • Hot water flow rate of 11.5 liters per minute
  • Low noise
  • Low fuel consumption
  • Easy and flexible to install
  • Can install either in vertical or horizontal position
  • Intelligent fuel adjusting mode
  • Can route pipe behind the boiler
  • 1 year warranty
  • Output of 28kW
  • Uses natural gas

Potterton Promax Combi 33kW

The Potterton Promax Combi 33kW has low Nox emissions. It is friendly to the environment. The boiler is easy to install and the work takes little time.

Potterton promax

The boiler uses gas and is efficient in fuel consumption. It has outstanding features which include:

  • An optional standoff bracket that allows for fixing of pipes behind the boiler
  • Nox Class 5 making the boiler environmental friendly
  • 2 years warranty that covers both parts and labor
  • Simple to use hot water controls
  • Mechanical clock for maximum energy efficiency
  • Uses natural gas
  • Can fit multifit gas saver
  • 20 meters long flue
  • Hydraulic connections
  • Modulating mode to intelligently control and regulate fuel consumption
  • Can pre-install pipes and fix the boiler after occupying a property

Potterton Promax Ultra

Potterton Promax Ultra boilers are reliable and efficient with a rating of ‘A’. They are available in the output ranges of 24kW, 28kW, 33kW and 40kW.  These models are ideal for all property sizes. The boilers have an inbuilt frost protection. This ensures that they work in all seasons. The flue is 20 meters long and allows you to install wherever you choose.  The Potterton Promax Ultra features are:


  • High efficiency rating
  • 20 meters long flue
  • Built-in frost protection
  • Saves energy consumption
  • Uses gas and electricity
  • Does not need conversion kit
  • Strong and solid base
  • High hot water flow rate

Potterton Combi Boiler Prices

The Potterton combi boilers provide instant hot water. They offer great savings in fuel and water bills. The boilers are long lasting and efficient. They give maximum water pressure when only one tap is in use. The boilers give huge savings on water and power bills to smaller homes and properties. They are compact and easy to fit.

potterton combi boiler

The Potterton Combi boiler prices are fair and affordable. They range between £640 and £996 depending on the output and flow rates.

Potterton Promax Combi 24kW – Price Range

The Potterton Promax Combi 24kW is ideal for small homes and properties. It uses natural gas and is trustworthy and energy efficient. It modulates energy well, saving money on fuel bills. This boiler price is from £666 upwards depending on the size and output. The price is excluding installation costs.

Potterton Promax Combi 28kW – Price Range

The Potterton Promax Combi 28kW is compliant to the Energy-related Products (ErP) directive. It has a compact design and ideal for installation in a kitchen cupboard. It is efficient in energy consumption and saves on power bills. The price of this boiler is from £842 upwards. This will, however, depend on the size of your property and budget.

Potterton Promax Combi 33kW – Price Range

The Potterton Promax Combi 33kW is cheap to maintain and offers good savings on power bills. The boiler is easy to install and has a long life span. You can mount this boiler on the wall, thanks to the long flue of 20 meters. The boiler looks neat after installation. This is because the pipes fit well behind the boiler. The manufacturer gives warranty covering parts and labor. The price of this boiler starts from £1045 going up.

Potterton Promax Ultra – Price Range

The Potterton Promax Ultra boilers are efficient and have the SAP 2012 efficiency rating. They are available in the output ranges of 24kW, 28kW, 33kW and 40kW. The boilers have inbuilt frost protection and work in all seasons. The long flue of 20 meters allows for easy and flexible installation. Therefore, you can install the boiler in any chosen space in the house.

The 40kW model is ideal for large properties. In addition, it delivers hot water at a higher rate and distributes to several taps at the same time. You can register the warranty of your Potterton Promax Ultra online. The cost price of this boiler depends on the output with the 28kW starting from £893.

Potterton Promax Combi Boiler Problems

Potterton Promax Combi boilers are efficient and easy to use. The manufacturer uses approved and genuine parts in all boilers. However, after a period of use, the boiler needs service. This improves the boiler condition and extends its life. The boiler will sometimes develop some minor problems. These are normal and easy to fix since the manufacturer provides an operation and solutions manual.

You can troubleshoot and fix or engage a qualified technician. Spare parts are available in most local shops and are cheap. Potterton Combi boilers will show an error in the display whenever there is a problem. Each error represents a different issue. The error codes are explained in the operations manual. These are some of the common fault:

1. Leak beneath the Boiler

If the pump fails to start, check the pump proving switch or primary flow switch. This fault appears when the O ring seal is leaking beneath the boiler. You can replace the O ring, but it is easier to change the whole switch. This is because the switch can fail and leakage is not visible. First drain the boiler before undertaking repairs. Call a technician if unable to carry out the work.

2. Explosive Ignition

When you hear a loud bang each time you turn on the boiler, the fault is in the burner. Remove and replace the burner to fix the problem.

3. Boiler Locking Out

The boiler goes to lock out mode and requires resetting. Sometimes you will need to reset the boiler several times before the problem disappears. This is a fault in the printed circuit board. The problem is mainly in the earlier Potterton Promax combi boiler models. The Company has now put modern circuit boards in the new models to rectify this fault.

4. Low Boiler Pressure

The boiler will go to lock out mode if the pressure is low. Inspect the boiler and check for any leaks in the pipes and safety valve. Underneath the filling loop, you will find a tap counter. Turn it on and wait for the pressure to rise. The boiler will heat once pressure gets to the normal level.

5. Little Hot Water in Taps

This is as a result of the airlock in the pipes. The problem seems easy to fix. Simply open the locked hot water tap and the main water tap. Let the pressure from the main water tap push air out of the hot water tap. Leave both taps open for several minutes. Turn off the hot water first followed by the main water tap. The hot water volume will go back to normal.

6. Water Not Heating

If you turn the power on and the water does not heat, check the thermostat. The problem could be the batteries. Check on the display if there is a flashing light. Some models will flash a battery sign on the battery. Battery replacement is simple. Open the battery compartment and remove the old batteries. Buy the same type of batteries and replace. Set the boiler afresh and turn it on. This will fix the problem and the water will start to heat.

All boilers need a full service from time to time though, not immediately. Hence, you should consult a qualified technician and arrange for a full service regularly. Replace all the worn out parts with new and approved genuine parts. Consequently, the boiler will run for a longer period without experiencing any fault.

The Potterton Primax Combi boilers give you peace when it comes to power bills. The boilers have a fuel modulating mode that intelligently control energy consumption. This happens in the background and prevents power loss. The boilers are available in different models. They are modern and compact. The combi boilers are easy to use and cheap to maintain. The manufacturer covers parts and labor in the warranty in some models.

This saves you a lot of money on installation costs. The common minor problems are easy to fix. With regular service, the boiler works smoothly for a long period. It is always expensive to service and maintain an old boiler. If yours is older or you want a new boiler, buy the modern Potterton Promax Combi boiler. Choose the Potterton Promax boiler model that is suitable for your home. The price is fair compared to the many benefits you will enjoy.

Need a Professional potterton Combi Boiler Installer?

Have you just bought or intend to buy a Potterton combi boiler and are looking for a professional installer? Contact us today for a free quote. We have professional, licensed and bonded installers ready to fit your boiler at competitive prices. Furthermore, we do repair malfunctioned boilers and do offer useful advice to homeowners. A friendly and caring representative is waiting to respond to your request.