If you're not sure how to program your Sunflow heating system, we've created a range of manuals and video guides to help.

Below you can find all of our self-help videos to get the most of your heating program.

You'll also find options to download the instruction manual for your thermostat.

You can download a copy of the user manual for your CZC1 Controller by clicking the button below.

CZC1 Manual

Video Guides

Features of the Sunflow Thermostat

You can download a copy of the user manual for your Sunflow Smart Controller by clicking the button below.

Sunflow Smart Controller

Video Guides

WiFi Smart Thermostat How-to

You can download a copy of the user manual for your Sunflow Manual Controller by clicking the button below.

Sunflow Manual Controller

You can download a copy of the user manual for your Delta Dore Thermostat by clicking the button for your model below.

DD RF6620 Installation Guide
DD RF6620 User Guide
DD Tybox Thermostat Installation Guide
DD Tydom Home Hub Installation Guide
DD Tydom Home Hub User Guide

Still stuck?

For telephone support check out our Extended Support Services by clicking above, to give you total peace of mind with your home heating.

With energy costs rising, we're all looking to save money on our energy bills...that's why we created our running cost guides.

Our 5 Tips Guide is there to help with setting up your heating system. It gives all the information you might need to make the most of your heating and reduce your energy costs.

Our Yearly Heating Cost Guide tells you everything you need to know about how much a Sunflow heating system might cost to run depending on your circumstances.

If after looking through our guides you need help with programming your heating, you can find our programming videos and thermostat user guides by clicking "I need help programming my heating" at the top of the page.

Something not working as expected?

Faults on our heaters are rare, and there are a few things that you should check to see if you can find and fix the fault before getting in touch.

We'll now guide you through a series of questions to provide you with the right support.

Your controller has lost connection with the radiator.

Your controller needs to be re-paired with your heater.

For instructions on how to re-pair your controller download the instruction manual using the button below.

If the display is not showing the icons correctly or is off, it's likely that the batteries have run out of charge.

Simply change the batteries and the control should work again, although you may need to re-pair the controller with your heater if the LED is still flashing after changing the batteries.

For instructions on how to re-pair your controller download the instruction manual using the button below.

The first thing to check is whether there is power coming into the radiator.

We recommend that you check:

• Have you tried another appliance in the plug to see if that works?
• Have the circuit breakers on your main circuit board tripped? Do they keep tripping when you reset them?
• Check the fuse in the plug or connection unit to make sure these haven’t blown.

If there is no power to the radiator or the RCD/fuse keeps tripping when the heater is switched on there could be an issue within your heater, please complete our webform below or give us a call on 0800 158 8272 (selecting option 3 for Technical Support) and one of our team will be happy to help.

Your controller has lost connection with the radiator.

Your controller needs to be re-paired with your heater.

For instructions on how to re-pair your controller download the instruction manual using the button below.

If the display is not showing the icons correctly or is off, it's likely that the batteries have run out of charge.

Simply change the batteries and the control should work again, although you may need to re-pair the controller with your heater if the LED is still flashing after changing the batteries.

For instructions on how to re-pair your controller download the instruction manual using the button below.

If you turn the temperature up really high does the LED go red & if you turn the temperature down really low does the LED go green?

If the LED is changing colour when you adjust the temperature it suggests your heater is working correctly.

Try leaving the heater with the LED on red for around 30 minutes. If the heater is now hot, it might be that your program isn't set to best suit your needs.

For more information about how to program your heaters, click "I need help programming my heating" at the top of the page and check out our video guides.

If after the 30 minutes is up your heater is still not heating up correctly, complete our webform below or give us a call on 0800 158 8272 (selecting option 3 for Technical Support) and one of our team will be happy to help.

There could be an issue with the control component within your heater, please complete our webform below or give us a call on 0800 158 8272 (selecting option 3 for Technical Support) and one of our team will be happy to help.

If your RCD/fuse has tripped there could be a problem anywhere on the circuit that the RCD feeds or on any appliance on the circuit.

There could be an issue within your heater, please complete our webform below or give us a call on 0800 158 8272 (selecting option 3 for Technical Support) and one of our team will be happy to help.

As the RCD/fuse isn’t tripping when your heater is switched on, it’s likely that the problem is somewhere else on the circuit. In this case we'd recommend getting in touch with a local electrician who can make an assessment of the wiring and any works that might be required.

We offer a range of extended support services to our customers who want that extra peace of mind with their home heating.

On top of our standard warranty, we offer Silver and Gold Extended Support.

Want more information?

Complete our form below and a member of our Support Team will call you back to help you find the correct service for you.