Vaillant 171125 Thermocouple - MAG

  • Our Part No: 1373998
  • MPN: 171125

We're sorry but this product has now been discontinued by Vaillant Boiler Spares and can no longer be purchased.

No known replacement is available.

Why Choose DHS?

Vaillant 171125 Thermocouple - MAG.

Product Information: A thermocouple is an instrument that is made of two different metals that produce a slight charge when heated on one side. This small electrical charge switches on an electromagnet which opens a valve and no longer restricts the flow of water or gas.

We dont have this part listed against any boilers present on our website, if you have been told that this is the part you require please contact us.

We recommend that all parts are fitted by a fully qualified gas safe certified technician. Please feel free to contact us if you require our assistance finding a part. Collectively we have over 200 years of boiler spares knowledge and distribution experience and our friendly call centre staff will be happy to help you with any query you may have


The Vaillant 171125 Thermocouple - MAG is a genuine, brand new Vaillant Boiler Spares product, covered by a Vaillant Boiler Spares manufacturer's guarantee.

Not what you're looking for? Try our unique Spares Finder tool or you can view all Vaillant Boiler Spares products.

For advice on this or any product, please call us on 0330 123 3707, email us at web@dhsspares.co.uk, or see additional ways to contact us here.

At DHS we offer a range of product options to suit different budgets and requirements, while maintaining quality and reliability across all categories.

Below is an explanation of each product type available on our website. Please note that not all products will have all options available.

Unbranded Part

BEST VALUE

Unbranded Component Product. Genuine manufacturer component, but no branded packaging.

  • Sourced Directly from the Manufacturer
  • Supplied in Unbranded Packaging
  • Same Quality & Function as OEM Version
  • Cost Effective Alternative
  • 12 Month Warranty

Branded Part

ORIGINAL PART

Original Equipment Manufacturer Component with branded packaging.

  • Genuine Original Part
  • Sourced Directly from the Manufacturer
  • Manufacturers Official Packaging
  • Trusted Manufacturer Quality
  • 12 Month Warranty

Alternative Part

Compatible replacement parts sourced from a third party Manufacturer.

  • Lower Cost Replacement Option
  • Fully Functional Alternative
  • Appearance, design or materials may differ from the original part
  • 12 Month Warranty

Refurbished Part

Original OEM components that have been professionally refurbished.

  • Genuine OEM Component Professionally Refurbished and Tested
  • Environmentally Conscious Choice
  • Excellent Value for Money
  • 12 Month Warranty

Need Help Choosing?

If you are unsure of which product category is right for your repair or installation, our team is happy to help.

Contact us for expert advice on compatibility, pricing and availability.

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