No hot water Hortsmann 7

[littlespark]

Ideally a plumber changes the element and an electrician connects it up…. But most plumbers will do both jobs.
Not many electricians try it. We don’t like getting wet.

As mentioned above, the act of changing the element is not without risk and a plumber is more likely to have the materials in his van to fix a problem there and then.

For 4 days without hot water, I’d be sending a strongly worded communication to whoever is the boss of the housing there.

 

[Superman]

Generally speaking what is typical off peak timer setting people use with these timers? 12am ON - 7am OFF?

 

[brianmoooore]

Generally speaking what is typical off peak timer setting people use with these timers? 12am ON - 7am OFF?

That's the limits at both ends, and should be avoided in case the off peak time gets slightly out of sync with the timer.
4 or 5 hours is enough time to heat most tanks.
My own Horstmann 7 switches on about 3am. If the bedroom door is open, and I wake up in the night, I can tell whether it is before or after 3am by whether there is a faint orange glow on the wall outside.

 

[westward10]

So has the other element heated the water.

 

[Superman]

So has the other element heated the water.

The boost element heated the water…don’t think the boost option is meant to be used more than the off peak elements as this would be pricey on the electricity bill I’m assuming?

 

[brianmoooore]

Expensive if you use it during the day, but, assuming there's a modern dual rate tariff, and not some ancient twin meter set up, exactly the same cost IF the boost is used between 12 midnight and 7 am.
Note that the 12 to 7 might be GMT, so 1 to 8 in the summer.

 

[Superman]

Hey guys thanks for your help. For the past 3-4 days my mum has been getting hot water after setting the off peak timer properly. Currently I have set the off peak timer to come on at 3am and go off at 7am. In your experience with this type of timer would you say this is too long to have on? Would you recommend a shorter duration perhaps?

 

[brianmoooore]

That duration sounds fine. Once the cylinder has heated up, the thermostat inside the immersion heater will switch off, and no more power will be consumed.
Of course, once the water has heated, heat will begin to be lost from the cylinder, but as long as it's well insulated, this will be minimal.