Horstmann 425 CORONET 425 Coronet Programmer

  • Our Part No: 4210000
  • MPN: 425 CORONET

We're sorry but this product has now been discontinued by Horstmann Controls and can no longer be purchased.

No known replacement is available.

Why Choose DHS?

Horstmann 425 CORONET 425 Coronet Programmer.

The Horstmann 425 Coronet Timeswitch is a single circuit timeswitch which can be used with combi boilers and immersion heaters. It uses a mechanical rotating 24-hour dial to set up to 2 on/off time periods per day as well as slide switches to adjust the on/off settings.

Timeswitch options

  • On all day
  • Permanent On/Off
  • On/Off twice a day

The 425 Coronet is 13 Amp rated and can be used with loads up to 3kW as well as conventional heating.


The Horstmann 425 CORONET 425 Coronet Programmer is a genuine, brand new Horstmann Controls product, covered by a Horstmann Controls manufacturer's guarantee.

Not what you're looking for? Try our unique Spares Finder tool or you can view all Horstmann Controls 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.

This part fits the following 3 appliances (sorted alphabetically):

May fit others. If you are unsure of your product model, or would like more information, please contact us.

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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