Repairing Vaillant Boiler: Most Common Problems

Vaillant specializes in providing homeowners and contractors with reliable and energy-efficient boilers. This expertise of Vaillant company shows why many customers prefer Vaillant combi boilers so often. These combi boilers, which are famous for their quality, performance and durability, may encounter malfunctions and errors like any other combi boiler brand. In order to avoid these problems, your Vaillant combi boiler should be checked regularly by an expert team.

In this article, we shared with you general information about the Vaillant brand, the best-selling system, combi and regular boilers of the Vaillant brand and the prices of these boilers, the most common problems Vaillant combi boilers encounter and what to do in case of these problems. Although the information is accurate and as detailed as possible, it will be difficult to understand and solve the problem without a real expert heating team. In such a case, you can contact us and arrange an appointment for the maintenance and problems of your combi boiler.

You can have your combi boiler checked regularly by contacting us via the contact numbers on our website or over the internet. As a company that has been in this business for many years, we assign the most experienced and trained heating teams for you, and we do our best to make your boilers work longer. As Zara Heating, we care about the satisfaction level of our customers, we contact you immediately in case of any problem and we strive to solve your problem immediately.

An Overview of Vaillant Group
Actively operating in more than twenty countries and making sales in more than sixty countries, Valliant Group is a family company that has been in the market for approximately 150 years. The main purpose of this internationally recognized family company is to meet the heating, cooling and hot water needs of its customers and to help them save energy during their needs.

The Vaillant Group, the second largest European company in the sector, produces products for the ventilation and air conditioning market as well as heating technologies. In addition to its production and development facility in the UK, this company has production facilities in Germany, France, Spain, Italy, China, Slovakia and Turkey.

As products and systems with renewable energy are becoming more and more popular, Valliant Group, one of the world's leading manufacturers of heating and air conditioning devices, has given great importance to being environmentally friendly in its products. So much so that replacing an old heating system device with a highly efficient Valliant boiler saves more than thirty percent of energy, and in addition to this savings, carbon dioxide emissions can be reduced by up to thirty percent.

 

The Best Seller Vaillant Regular Boilers and Their Prices

The company Vaillant, which is Europe's second largest producer of heating technologies and is becoming more and more eco-friendly day by day, has six regular boilers that sell well. These boilers are Vaillant ecoTEC plus 435 Regular Gas Boiler, Vaillant ecoTEC plus 415 Regular Gas Boiler, Vaillant ecoTEC plus 430 Regular Gas Boiler, Vaillant ecoTEC plus 424 Regular Gas Boiler, Vaillant ecoTEC plus 412 Regular Gas Boiler and Vaillant ecoTEC plus 418 Regular Gas Boiler.

Vaillant ecoTEC plus 435 Regular Gas Boiler	With a warranty of up to five years and a market price of £1,453, this device has an efficiency of up to 93%.
Vaillant ecoTEC plus 415 Regular Gas Boiler	With an efficiency of 94% and a five-year warranty, this boiler retails for £911.
Vaillant ecoTEC plus 430 Regular Gas Boiler	With an efficiency of 94% and a price of £1,167, this boiler comes with a five-year warranty.
Vaillant ecoTEC plus 424 Regular Gas Boiler	This device, which stands out with its 94% efficiency and five-year warranty, is on sale for £1,007.
Vaillant ecoTEC plus 412 Regular Gas Boiler	The cheapest best selling boiler, this boiler has 94% efficiency, a five-year warranty and costs £805.
Vaillant ecoTEC plus 418 Regular Gas Boiler	Priced at £959, this boiler has a five-year warranty and an efficiency of 94%.

 

The Best Seller Vaillant Combi Boilers and Their Prices

Suitable for homes with one or two bathrooms, combi boilers are tasked with pumping hot water just as other boilers do. The best selling Vaillant combi boilers are the Vaillant ecoTEC plus 825 Combi Gas Boiler, the Vaillant ecoTEC plus 832 Combi Gas Boiler, the Vaillant ecoTEC plus 835 Combi Gas Boiler and the Vaillant ecoTEC plus 838 Combi Gas Boiler. The two biggest differences between these combi boilers are their prices and kWh quantities, apart from these differences, all of these combi boilers have an efficiency of 94% and a ten-year warranty.

Vaillant ecoTEC plus 825 Combi Gas Boiler	Requires 20.4 kW of energy and has a regular retail price of £1,152.
Vaillant ecoTEC plus 832 Combi Gas Boiler	This device needs 25.7 kW of energy and costs £1,248.
Vaillant ecoTEC plus 835 Combi Gas Boiler	With an energy requirement of 32.2 kW, this is the best -selling combi boiler that needs the most energy, and at £1,431 it is the most expensive boiler in this category.
Vaillant ecoTEC plus 838 Combi Gas Boiler	This boiler, which can be operated with 30.1 kW of energy, is on sale for £1,408.

 

The Best Seller Vaillant System Boilers and Their Prices

The best-selling and most popular Valillant System boilers are Vaillant ecoTEC plus 612 System Gas Boiler, Vaillant ecoTEC plus 615 System Gas Boiler, Vaillant ecoTEC plus 618 System Gas Boiler, Vaillant ecoTEC plus 624 System Gas Boiler, Vaillant ecoTEC plus 630 System Gas Boiler and Vaillant ecoTEC plus 637 System Gas Boiler. Although all of these combi boilers have a ten-year warranty, the efficiency ratio of all of them is more than 90 percent.

Vaillant ecoTEC plus 612 System Gas Boiler	This boiler, which requires 12.2 kW of energy to operate and has an efficiency of 92%, is one of the most affordable system boilers and costs only £902.
Vaillant ecoTEC plus 615 System Gas Boiler	Working with 15.4 kW of energy, this device has 93% fuel efficiency and the price of this device is £971.
Vaillant ecoTEC plus 618 System Gas Boiler	One of the most efficient and best-selling Vaillant system boilers, this boiler has an efficiency of 92% and a price of £1,098. In addition, 18.5 kW of energy is required for its operation.
Vaillant ecoTEC plus 624 System Gas Boiler	This boiler, which requires 24.4 kW to operate and has an efficiency of 94% when operating, is on sale for £1,227.
Vaillant ecoTEC plus 630 System Gas Boiler	This popular boiler with an efficiency of 94% and consuming 30.4 kW of energy costs £1,363.
Vaillant ecoTEC plus 637 System Gas Boiler	This boiler, which requires the most energy to operate and is the most expensive best-selling Vaillant system boiler, has an efficiency of 94%. This device, which requires 37.6 kW of energy, is priced at £1,537.

 

What are the Most Popular Vaillant Combi Faults and How to Solve Them?

Since combi boilers are devices that need to be checked regularly, you may encounter many problems if you do not have your combi boiler checked regularly. The most common problems Vaillant combi boilers face are frozen condensate pipe, low water pressure, constantly shutting down boiler and non-firing boiler.

What is the Frozen Condensation Pipe Problem and How to Solve It?

If any part of the condensation boats in your Moden combi boilers are outside, it is quite possible that this part will freeze in winter. The freezing of your condensate pipe may cause your combi to make strange and gurgling sounds and may cause your combi to stop working.

How to Solve?

If you are confident in yourself, you can solve this problem yourself, as a first step to solve this problem, you should put warm water in a bowl or prepare warm water with a kettle. You have to go outside to find the condensate pipe that is outside and is frozen. After you find the pipe, you should pour warm water on the frozen part, at this stage, you can also use hot water bags instead of warm water. After waiting for the ice to melt, reset your boiler when the ice melts completely. Contact Zara Heating if your boiler does not work even after doing all the steps correctly.

What is Low Water Pressure Problem and How to Solve It?

Low water pressure, one of the most popular Vaillant boiler problems, is a fairly easy problem that you can fix yourself. It is also possible that this issue is caused by a minor leak that you need to fix.

How to Solve?

You will need a heating engineer to check your boiler for leaks. If your problem is not caused by any leakage, repressurize the system by following the steps in your boiler user manual. If the problem persists then you should contact a Zara Heating engineer.

What is the Constant Shutdown Problem and How to Solve It?

Your boiler constantly shutting down may be due to low water pressure, thermostat problems, and lack of water flow.

How to Solve?

If your boiler is constantly shutting down because your water pressure is low, you should take a look at problem number two in the Vaillant boiler guide. If your water pressure is good, you need to check whether the thermostat is intact, but you can get help from us as only a qualified engineer can do this check.

Since air may be trapped in the system, you can try to ventilate your radiators to get rid of this air. If you are sure that your water pressure is good, that there is no problem with your thermostat, and that you ventilate your radiators, the problem may be with the boiler pump or another component. In this case, it is essential to get help from a heating team.

What is the Non-Firing Boiler Problem and How to Solve It?

If there is any problem with the ignition in your Vaillant combi, the F28 fault code will appear in your combi. This is usually because your condensate pipe is frozen or your ignition cable has failed, although in rare cases there has been a problem with the gas supply.

How to Solve?

First of all, you need to check whether your other gas-powered devices have any problems with the gas supply. If there is any problem with your other gas appliances, you need to contact your gas provider. However, if there is no problem with your other gas appliances, check whether your pipe is frozen or not, you can use the solution to the frozen condensate pipe problem that we mentioned in the first item to solve this problem. If there is no problem with your gas supply and your condensate pipe is intact, contact us.

See More: Boiler Replecament Guide