Hi, just wanted to let anyone else with this problem know that I have fixed my shower. My shower is a Redring Expressions 500s 8.5. I bought a MK2 Phased Shut Down PCB, part no 93550835 which was simple to replace - just clips in. Bought the part from, www.theshowerdoc.com, which is almost 1/3 cheaper than anywhere else. Also really fast delivery. Hope this helps.
Katrina
May 2010