Electric Relay No Power

Owned by Simon Turner
Sept 16, 2024

This article is an excerpt from the Genius Hub Doctor, which is built into the App.

These instructions are provided so that the step-by-step information is available to users, but please note that these actions should generally be carried out whilst using the Doctor.

To access the Doctor, click here

Solution ID: 7355

Step 1

The Electric Relay should always be powered on.

Let's take a look at what could cause a loss of power.

First, check if the fuse that feeds the power to the Electric Relay has blown.

Check the fused spur which feeds the power to the Electric Relay and what it is wired to. If there is a neon light on the device, this should be on.

If the neon light is off, the fuse will need to be replaced with one of the same type and rating.

Do not do anything with electrical wiring, unless you are confident and competent to do so!

UK legislation says that:

" A competent person is someone who has sufficient training and experience or knowledge and other qualities that allow them to assist you properly. "

We may mention in these instructions to do checks on wiring - if you are not a competent person, then you should have an electrician carry out these checks.

Unfortunately, Genius Hub are unable to provide assistance with checking wiring. An 'electrically competent person' will be able to use the wiring diagrams that we provide to check or install a Genius Hub system. To see our map of registered Genius Hub Trained Installers, Click Here .


Step 2

A lack of power could also be caused by a circuit breaker that has tripped.

Check the relevant circuit at the Consumer Unit to ensure that the correct circuit is turned on for this part of your heating system.

If this trips again, one of the devices on the circuit has an electrical fault and should be investigated by a competent professional.


Step 3

One more thing to check - t here may be a loose wire between the supply and the Electric Relay.

This must be done by an 'electrically competent person'!

The Electric Relay will have to be removed from its pattress to check the connection.

  1. Unscrew the Fused Spur or Blanking Plate from the front of the pattress.

  2. Check the wiring against the Electric Relay wiring instructions ( https://www.geniushub.co.uk/wiring )
  3. Re-screw the Electric Relay into the pattress. and fit the front cover.

The Electric Relay should have 1 solid red light when it is calling for heat. This can be tested by pressing the button to toggle the device.