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Well it's all fixed now... Turned out that the thermostat that came with the new element was faulty and shutting off at about 25C lower than the stated temp. So it was warming up a little bit and then cutting out. Replaced it with the one from the old one, and now it's all running great...

Morning bab, The house is about 15 years old so the hot water system is much newer (I only bought it in July). The power is a split distribution board, with 15A cartridge fuses. There are individual circuits for each heater - one on the nighttime side for the E7 heater, and one on the...

Yep, it was definitely live. Waited up till the night timing kicked in, and then checked the power on both sides of the 'stat. I still have the thermostat from the old one, so I can easily swap that in if there's a problem tonight. Since the top half was hot, there'll be a cold/hot layer...

Well I drained the system, removed (without too much difficulty, luckily!!) the old heater and found it was warped and split along most of it's length. So I guess that was the problem... however, this morning, I still had no hot water at the bottom of the tank and the brass boss of the new...

Bad form to follow-up my own post I know, but I've found the problem... I retested the resistance of the two elements and found that the lower one is in fact an open circuit, while the top one is around 20 ohms. So I guess it's definitely the lower heater that's failed, even though it's only...

Thanks bab. When the top element comes on (and in fact the bottom one too) then after just a few minutes I can hear it making a quiet sizzling noise, rather like a kettle. I didn't get that at all from the bottom one, though normally I can on those occasions when I'm padding about late at...

Sadly no overheat button on the thermostat. Also, testing with a simple neon screwdriver shows that both sides of the thermostat are live, so I don't think it's the 'stat stopping it heating up. Shame, cos I don't fancy going through all the hassle of draining the tank and swapping the...

Hello all, Help! Yesterday morning I woke up to find no hot water. I have an Economy 7 water tank fitted with two immersion heaters, one at the bottom of the tank and one about halfway up. The lower heater is wired to a circuit which is only live during cheap rate, and the upper is wired...