How can high pressure affect my Freeview reception?

High pressure isn’t something that is easy to detect. It’s usually associated with hot weather but can happen at any time of the year. 

High pressure can cause two potential problems. The first is that you receive a weaker signal, as the signal from your local transmitter is lifted higher into the sky. The second is that the signal from a distant transmitter interferes with your reception.   

How to check for high pressure 
The ý monitors for high pressure and will publish a notice on the Works & Warnings page when high pressure could be problematic to viewers. 

What to try if you’ve lost reception due to high pressure
Check the Works & Warnings page for a high pressure notification. If there is high pressure happening, all you can do is watch by another means, like ý iPlayer, or satellite until the weather changes. If there is no high pressure warning, try our problem assistant tool, where you can check for transmitter problems and work through troubleshooting guidance. 

Avoid retuning
Do not try retuning when there is high pressure, as you can lose services or store signals from a distant transmitter. If you did try a retune, you’ll need to do it again once the high pressure has passed. We suggest performing a manual retune where you can select the transmitter you receive service from.