How to check your cables for water damage

Cracked, split or damaged cables and connectors can cause reception problems, especially if water gets into your aerial or satellite dish installation. The water will reduce the quality of the signal going through the cable and cause pixelation and loss of channels.


  1. If possible, check the external cable for any signs of damage, such as cracking and tears. Damaged cables can cause reception problems and can allow water into your installation.
  2. Find the cable that goes from your aerial or satellite dish into your television, radio or set top box and unplug it. This may be from a socket on the wall or a direct cable through the wall.
  3. If you are using a satellite dish to receive your television, you will also need to check the LNB and cap for any signs of water damage. You may need to instruct a qualified installer to assist you with this.
  4. If it is a direct cable, check for any obvious signs of water or a green build-up on the connector. If it is from a wall socket check both the connector on the cable and on the wall socket for any signs of water or green build-up. A green build-up is a sign that water has at some point got into your installation. 
  5. If you find water damage then it is likely that the cable will need replacing by a qualified aerial installer.

We cannot recommend individual installers. However the CAI (Confederation of Aerial Industries) is a recognised trade body which will be able to put you in touch with one of their members in your area.