Several years ago, a plumber set my hot water temperature to be very high to stop the (small) cylinder from running out of water. I now want to reduce the temperature to save on bills. It is electric immersion only. I located the thermostat under the jacket. I used a screwdriver to move the arrow from just over 80 degrees to 60 degrees. However, a few days later, the water is still very hot at the taps, so I don't think it has had any effect. Does anyone have any ideas? Thanks
Immersion heater thermostat unresponsive
- Thread starter DIY10291
- Start date
Sponsored Links
- Joined
- 27 Jan 2008
- Messages
- 23,630
- Reaction score
- 2,662
- Location
- Llanfair Caereinion, Nr Welshpool
- Country
The immersion heater thermostat is built into the immersion heater, that one controls central heating.
- Joined
- 27 Jan 2008
- Messages
- 23,630
- Reaction score
- 2,662
- Location
- Llanfair Caereinion, Nr Welshpool
- Country
Clearly turn off power first, but will find the thermostat under cover.
Ah, right! In my house, the boiler is wired only to respond to the house thermostat (and heats the hot water up whenever the house happens to need heating). So when the central heating is off, the hot water is immersion-only.
So the hot water thermostat will be at the top of the cylinder somewhere? Is it hard to get to? (There is a lot of clutter around there, but I'll have a look).
And the thermostat I found here is the circulating temperature of the hot water in the heating system? Is a little over 80 degrees maximally efficient for this? And the settings on my (old, back) boiler correspond to the setting for the boiler, which affects how long it takes the CH to reach the 80 degrees, and the main house thermostat controls when the whole thing is needed? Just trying to understand how it all fits together, with there being (at least!) 3 different thermostats in the system. Thanks again
Sponsored Links
Electricity is far more expensive than gas or oil.
Use the boiler to heat the cylinder.
Op states it operates with the heating, so either old gravity circs or knackered valves (as I’m sure you know).
It would be worth you doing then, as @flameport says, electricity is more expensive than gas.
I just checked out the right thermostat this time, and was shocked to see it was set to 55 degrees. Is it normal for the HW to be set to 55 degrees, yet when I run the hot tap to the hottest I can't comfortably wash my hands in it? (For the bathroom tap which has no mixer).
I have thought about getting this done, but am not sure about the numbers, as I have heard HW is a small proportion of the heating bill. Would most plumbers be able to wire up the electric control box (we have one from the previous owner but it isn't connected to anything!) And any ideas on how much it would save a year, roughly?
Usually 60 degrees to kill off legionella bacteria. I would use a thermometer to test temperature.
Yes, a decent plumber should be able to do this, or an electrician competent in heating wiring. Not sure on the savings, but imagine quite a lot. The immersion is 3kw, similar to a lot of kettles.
- Joined
- 27 Jan 2008
- Messages
- 23,630
- Reaction score
- 2,662
- Location
- Llanfair Caereinion, Nr Welshpool
- Country
I do wonder, would like a time switch on immersion heated so it can be timed to finish off water heating, as I have no tank thermostat.
On my to do list.
As to if oil or electric cost, no longer sure, the oil heats up the pipe work, so more losses, I use just time to control, 4 x 1/2 hour a week.
On my to do list.
As to if oil or electric cost, no longer sure, the oil heats up the pipe work, so more losses, I use just time to control, 4 x 1/2 hour a week.
DIYnot Local
Staff member
If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.
Select the supplier or trade you require, enter your location to begin your search.
Are you a trade or supplier? You can create your listing free at DIYnot Local
Sponsored Links
Similar threads
