Vaillant Contact Number and Information

Company type: Manufacturer

HQ: Remscheid, Germany

Founded: 1874

CEO: Norbert Schiedeck

It may be difficult to find the exact Vaillant contact number to get tailored advice on your issue. Whatever your reason for contacting Vaillant, on this page, we put together a full list of Vaillant contact numbers and links you may find useful.

Vaillant Logo
Department Vaillant Contact Number
General Support 0345 602 2922
Technical Support 0344 736 0049
Book a service or repair 0330 100 3143

Vaillant Contact number for General Support

For most questions you might have, whether regarding boiler ranges, technical difficulties or your experience, the Vaillant contact number for all general enquiries is 0345 602 2922. From there, you might be redirected to another department if your issue is very technical or requires urgent attention.

Vaillant contact line opening hours are as follows:

Monday - Friday: 8am - 6pm

Saturday: 8am - 3pm

Sunday: 8am - 12pm

Alternatively, you can submit an enquiry online about any of the following:

  • Engineer request
  • Provide feedback
  • Ask for a callback
  • Literature and information requests
  • Guarantee queries

Simply choose the enquiry type from the drop-down menu and a member of the Vaillant team will get in touch.

Book a repair or service for your Vaillant boiler

Repair bookings if your boiler is in guarantee

If your boiler is under guarantee, the Vaillant contact number to dial is 0330 100 3150. You will need to have your Vaillant boiler serial number at hand to complete the process. The boiler’s serial number can usually be found on the panel on the front of the boiler. If you can’t find your serial number or would like to check whether your boiler is still in guarantee, call the customer support line and they will be able to provide you with such information.

Repair bookings if your boiler is out of guarantee

If your Vaillant guarantee has expired and you need a repair, you'll have a choice of one of these two options:

  • One-off fixed-price boiler repair. Click here to book a one-off repair. You will be able to choose a time slot and get a discount when applying online. Please note that the prices start at £285.
  • Sign up for Vaillant Repair and Care support plan, which will provide a one-off repair (where repairable) and then ongoing maintenance, boiler checks and support for your boiler and controls. First, follow this link to book an initial appointment. From there, you will be transferred to another site to pay for the plan. The price is £51.98 a month for 6 months totalling £311.88 (inc. VAT) and you will pay by Direct Debit.

Avoid unexpected costs.

With a Smart Plan cover policy, you can rest easy knowing if there's an issue with your boiler, we'll usually have you back up and running within 48 hours.

OR Find out more

Make a complaint

Things don’t always run smoothly: if you feel that a Vaillant product or service hasn't been up to your expectations and you would like to submit an official complaint, you can do this by filling in a complaint form below.

Submit a complaint

All complaints are carefully investigated by one of the Managing Directors’ support team. Although you will be provided with regular updates about the status of your complaint, Vaillant does not specify a timeframe within which you will hear back from them.

If your enquiry is urgent or you would rather speak to someone on the phone, give customer service a call on 0345 602 2922.

Technical Support

If you require technical assistance, check out Vaillant’s online troubleshooting tool, AskVaillant, as it covers most issues you might be experiencing with your boiler and accessories. You can read through the FAQ section or ask a new question by typing it in the search bar at the top of the page. For best results, enter your boiler model type, followed by the question.

If you were unable to find what you needed and want to speak with the technical team, the right Vaillant Contact number to call is 0344 736 0049. The technical team will be able to help you choose the best boiler for your needs, help you resolve faults or give you advice on what to do further.

Vaillant contact line for homeowner technical support opening hours are as follows:

Monday - Friday: 8am - 6pm

Saturday: 9am - 12pm

Sunday: Closed

Alternatively, fill in the form and explain what you would like assistance with. Once you have submitted your query, a member of the Vaillant technical team will be in touch.

Submit a technical enquiry

Seeing unfamiliar fault codes on your Vaillant boiler? Click here for information on the most common Vaillant boiler faults and potential solutions.

Download product manuals and brochures

Whether you’re looking for a misplaced boiler manual or some simple guidance on how to use your boiler controls, Vaillant has an extensive library of downloadable resources to assist you. In this section, you will also find useful troubleshooting tips and product specifications.

Browse product manuals

Didn’t find what you’re looking for? Email Vaillant at and they will send you the required materials.

Find a certified boiler installer

If you are considering purchasing a new Vaillant boiler and need it installed, click here to find a local Gas Safe engineer. Simply enter your postcode to get connected with an engineer for a free, no-obligation quote on your new boiler installation.

Register your boiler for Guarantee

Your Vaillant Guarantee entitles you to free help from Vaillant Service Engineers should anything go wrong with your boiler. Usually, registering your guarantee is your installer’s job; however, if you need to register your new Vaillant boiler yourself, click below:

Register your boiler for Guarantee

You will need to enter your 28-digit serial number (which can be found on the front of the control panel of the boiler), date of installation and your home address. Make sure you register your Vaillant boiler for warranty within a month of the installation date.

To keep the boiler under guarantee, please ensure that it is serviced by a Gas Safe registered engineer annually.

Give your boiler a service.

Make sure you don't invalidate your warranty. Call Smart Plan to get a boiler checkup to see if everything is in good working order.

OR 020 8146 3960

Still need help with your Vaillant boiler?

Call Smart Plan and speak to our expert engineering team free of charge.

0333 772 6247