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Hot Water Problems at home!

kristianity77 Avatar
7y, 3m agoPosted 7 years, 3 months ago
Hi All

Hoping someone here with more knowledge than me on this can help me out a bit here!! Am having problems with the hot water out of our tap being way way too hot. Were talking too hot to even put your hands under here. Anyway, i will describe what i have done so far.

On the boiler is a gauge which goes from 1 to 5 (1 being lowest) and this has always been set to 2 for the last couple of years. I changed this to 1, and checked the water the next day and its still scolding hot, so i put this back up to 2.

on the hot water tank in one of the bedrooms there is a similar dial ranging from 30C all the way up to 80c. This currently sits just under 70c and again, has done since as far as i can remember. I turned this down to 40c, waited a day, then tried the water again. No change,just boiling hot water. The hot water tank nderneath the cover is pretty much too hot to touch.

The timer under the stairs which controls the HW and CH clocks etc is currently off, and has been all summer

So how can i lower the temperature of my water or what is going wrong?

Any advice is very much appreciated!!
kristianity77 Avatar
7y, 3m agoPosted 7 years, 3 months ago
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banned#1
how can your hot water be turned off, unless of course you have an immersion heater, sounds like your thermostat in tank gone
#3
Sounds like the thermostat on the hot water tank is faulty or has come away from the tank. Make sure the metal "prongs" at the back of the thermostat is touching the copper tank.
#4
Also sounds like you have an immersion tank that is controlled by electricity (to override it) make sure this is turned off at the switch.
#5
Foxy102
Also sounds like you have an immersion tank that is controlled by electricity (to override it) make sure this is turned off at the switch.


Where might this be? On the landing upstiars is a red switch that needs to be on for the electric shower to work (else its just cold water) but would this not be only for the shower, or would this have something to do with it? (it IS possible that this is getting left on for long periods)
#6
Foxy102
Also sounds like you have an immersion tank that is controlled by electricity (to override it) make sure this is turned off at the switch.


That's excellent advice, when we moved in a couple of weeks ago my wife turned the switch on, unfortunately the thermostat is broken (i think) on the hot water tank so it just kept boiling away, opened the loft hatch and it was like a sauna!!
banned#7
kristianity77
Where might this be? On the landing upstiars is a red switch that needs to be on for the electric shower to work (else its just cold water) but would this not be only for the shower, or would this have something to do with it? (it IS possible that this is getting left on for long periods)


I have 2 cylinder thermostats for sale, p.m. me if interested.
The switch should be very close to your hot water tank, is there a cable coming from the top of the cylinder? If so trace it back to the switch, though even if this has been left on the water temperature should still be regulated be the thermostat.
banned#8
creek;6488086
Sounds like the thermostat on the hot water tank is faulty or has come away from the tank. Make sure the metal "prongs" at the back of the thermostat is touching the copper tank.

+1

wiggle the tank thermostat slightly or remove holding wire and clean it with wire wool or similar

spray the dial mechanism with wd40 or similar too

and turn your boiler back down to 2 as that doesnt have anything to do with HW temp
banned#9
your immersion switch will be next to the hot water tank, foolw the lead back from tank to switch, it should have a red light on switch unless of course its a bodge job
#10
^^^what they said. Should be a switch next to the tank (usually with a red light in it). Good luck :thumbsup:
#11
right ive come to the conclusion from reading up and stuff that the thermostat on the heater is indeed shafted. I can pretty much hear the thing boiling the water inside. I will not be able to get any one out to sort thi for a few days i expect, questionis, is this going to be safe liek this in the meantime?
#12
also, the immersion switch, i cannot find anyithng near the tank. only an electrical switch wihich says Water Heater, would this be it?
#13
Yup that's it, the immersion heater also has a temperature setting on it, turn the switch off and undo the but on top of the immersion and take the top off, have a look at the setting and adjust accordingly.

Cylinder stats should be set to 60c

I imagine your elecricity bill is a scary read.

Also on temperatures over 60c you create limescale which will eventually fill the cylinder.
#14
so should i turn this water heater switch off? Will this leave me with no hot water, whats the story? lol
#15
yeah if your boiler is off but the water is red hot it will be because the immersion is on and is faulty, it will not be reuglating the temp, just on constantly
#16
trace the cable from that switch back to see where it goes to, if it goes to the top of the cylinder turn it off.

then turn the hot water on the timeclock on and the boiler will do what it was supposed to do.
#17
kristianity77
so should i turn this water heater switch off? Will this leave me with no hot water, whats the story? lol


I would only turen it on for an hur or so when you need hot water, don't leave it on all the time:)
#18
so if i turn this switch off then, will m hot water then be controlled by the timer box thing downstairs instead? So if its set to come on for say a couple of hours in the morning and a couple at night thats when it will turn on, have i got that right?
#19
yes but it's more efficient to have the timer on 24 hours as the cylinder stat turns the boiler off when the temperature correct. It's cheaper to top the cylinder up rather than heating a cold tank from scratch
#20
pinkleponkle
yes but it's more efficient to have the timer on 24 hours as the cylinder stat turns the boiler off when the temperature correct. It's cheaper to top the cylinder up rather than heating a cold tank from scratch


Why? Looking forward to this...;)
#21
right so i have turned the siwtch off, and the sound of boiling has gone away. So if i now set my timer downstairs to have HW on during certain hours, will this work even tho the Water Heater switch next to the tank is OFF? Or am i best to just keep flicking this switch for an hour or so every time i need hot water until i can get it fixed?
#22
The water heater switch is your immersion heater leave it off. The boiler will still heat the hot water.

Just set the HW to come on for about an hour in the morning, same at night.
#23
greg_68
The water heater switch is your immersion heater leave it off. The boiler will still heat the hot water.

Just set the HW to come on for about an hour in the morning, same at night.


much appreciated!! :thumbsup:
#24
kristianity77;6491433
right so i have turned the siwtch off, and the sound of boiling has gone away. So if i now set my timer downstairs to have HW on during certain hours, will this work even tho the Water Heater switch next to the tank is OFF? Or am i best to just keep flicking this switch for an hour or so every time i need hot water until i can get it fixed?


Right, the boiler you have uses gas and heats water and sends it to the HW storage tank where it stays until you use it. If you turn off the power to the immersion you will still have HW as long as the boiler is set on HW for a couple of hours a day. The electrical switch on the cylinder is only required if your boiler is packed up, or you want constant HW. Turn it off, you don;t need it whilst the boiler is working. fine
#25
greg_68;6491465
The water heater switch is your immersion heater leave it off. The boiler will still heat the hot water.

Just set the HW to come on for about an hour in the morning, same at night.


beat me to it!
#26
Foxy102
Right, the boiler you have uses gas and heats water and sends it to the HW storage tank where it stays until you use it. If you turn off the power to the immersion you will still have HW as long as the boiler is set on HW for a couple of hours a day. The electrical switch on the cylinder is only required if your boiler is packed up, or you want constant HW. Turn it off, you don;t need it whilst the boiler is working. fine


It is more likely that the boiler uses gas and heats water which passes through a hot water tank in a coil. The coil is a heat exchanger which passes energy through to the water in the hot water tank and heats it.

Is it not?
#27
^^^ I think foxy was trying to keep it simples.
#28
pghstochaj;6491540
It is more likely that the boiler uses gas and heats water which passes through a hot water tank in a coil. The coil is a heat exchanger which passes energy through to the water in the hot water tank and heats it.

Is it not?


I was trying to simplify it for the OP!
#29
Foxy102
I was trying to simplify it for the OP!


Ok.
#30
I'll stick with my combi, its a lot more simple!
#31
my water is literly boiling hot, got air cuboard with water tank water is not even turned on mercent heater thing never been turned on we have lived here 4 months now thermostac been changed still boiling water wife is really worried as she dont know where the cold tank is , cant get in loft and shes read about steam heating cold tank and breaking etc. guys who lived here before messed with everything here.
#32
Blame the politicians lmao
#33
Many thanks to 'Creek' for the advice on making sure the metal back of the thermostat is touching the immersion heater, my husband checked it as our hot water was scalding hot and kept heating constantly and as soon as the metal on the back of the thermostat touched the immersion heater it stopped boiling and this new tank was fitted 5 days ago by the local housing trust so I will be complaining to them tomorrow.

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