Wolf Hunting
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Sorry, only just saw this. Your immersion heater is dead simple.We have British Gas Homecare but the boiler is about 13 years old now. Every time they service it they warn us that it’ll be hard to get parts for it if something breaks.
We have an immersion switch in the airing cupboard (which I’ve never used nor do I understand how it works!) I presume I can get hot water via that if the boiler is knackered?
If it's a simple basic one, you have your tank of water, on the outside of you tank is a dark brown round box about 3".
Coming out of that and down into your tank is a bright shiny metal tube, fairly thin. This is your element. When you switch it on, it'll radiate electricity and start to heat up your water. You can set the temperature to how hot you want it it.
There's a bit of a debate about this, basically if you set it very hot, you wont use it all, to say, fill a bath because it's so hot, you'll only use half and then fill it up with cold water, or you only heat it up to a comfortably warm temp and then use it all with minimal cold water.
You decide.
If it's better than a basic one, you'll have 2 switches, on that says 'Bath', one that says 'Sink'. This will mean you have 2 elements going down into your water tank. One is around 18" that'll just heat a couple of sinks but no more. Uses a lot less electricity, but only heats the top bit of your tank. The 2nd one is the long one for heating the main part as described.
We leave ours on all the time, but carefully set the thermostat so even though it's switched on, the stat cuts it out when it reaches the desired temp. So we always have hot water.