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Yes, swapped the immersion elements round. This confirmed both elements are still working. I'm still in the position where only boost mode works.

I'm just about to buy a new unit. I've got one of these old style looking ones - Can I just do a straight swap with one of these newer style ones

Before buying a replacement, any advice on what and where to buy? Also how can I check or even set the time on these units?

Hi, I have an Economy 7 immersion heater setup with a Horstmann Economy 7 Quartz control unit. One morning I woke up to find there was no hot water and since then the Economy 7 mode has not worked. I have checked the fuse, seems ok. The Boost mode still works. Initially I thought the...