Are you sure you've plumbed into in to your mains supply? If you're trying to run on the gravity supply from a header tank there won't be enough pressure for the shower to operate. If in doubt speak to the Mira technical helpline on 0844 571 5000
XTC7MUSIC
April 2010
Automatic Answer
We may have found other answers which could help you.
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix baths and showers.