alright guys bit of a problem here i got called to a job with 2 eco 7 storage heaters that wasnt working, basically the 24hr would work but the eco 7 wouldnt switch on, i linked out the eco7 with a temp supply all came on so i presumed it was the service provider problem, edf came and played about apparently but ive got to go back tomorrow as its still not comin on during the night.....what could be the cause?????? headbang