A few days ago our Dyson CR02 'door lock light' wouldn't go out when the programme finished, so the washing couldn't be removed. After reading that Dyson have a standard call out charge of £85 I phoned our local repair man who said he could fix it and would charge £45 call out. He was very helpful but busy and hadn't turned up by 5pm so I decided to open the machine myself, after unplugging it. The top comes off after removing 2 screws at the rear but it isn't easy to go much further; however I saw a ribbon cable (rather like you find in a PC) obviously carrying electrical signals. I unplugged it and re-plugged it, then refitted the top. After switching the electricity on again - the door light had gone out, and the machine is working normally again!
I assume that the plug had been loosened by the machine vibrations.
I hope this may help others with this problem, which appears to be a common occurrence.
Derek, October 2008