Central Heating Problem. Can anyone advise? - HotUKDeals
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Central Heating Problem. Can anyone advise?

kristianity77 Avatar
7y, 11m agoPosted 7 years, 11 months ago
Now its starting to get towards the winter we have the heating on in our house. Lately though i have noticed that they dont really heat the house much. And even on full, the radiators are not very hot to the touch. In our last house with them on full they were too hot to keep your hands on for more than a second or two. But in this house now, they are only mildly warm.

Having no problems with water being hot thought, just the heating.

Im not overly clued up on this sort of thing. Is there anything i can do myself to solve this?
kristianity77 Avatar
7y, 11m agoPosted 7 years, 11 months ago
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#1
radiators on fully?
#2
we have adevice on the wall near the switch which goes from 10 i think up to 30 degrees. But this doesnt make a difference to the radiators temp at all
suspended#3
have you got one of those keys that you use to " bleed" the radiator? It could be that there is an air build up and I know that in our old house when I did that they air came out and then lots of rusty water! Had hot rads again after that- some radiators are self bleeding if that makes sense but usually only newer ones.

hth
x
banned#4
bleed the system and make sure is no air in the rads
#5
been in this house were in two years now and they have never been bled yet as far as i know. So will attempt to have a look at that tonight to see if it makes a difference. Have a digital thermometer in one of the rooms and the highest the temp will reach in my living room s 18 degrees. Which is still quite cold.
#6
kristianity77
we have adevice on the wall near the switch which goes from 10 i think up to 30 degrees. But this doesnt make a difference to the radiators temp at all


what i meant was make sure each radiator is opened fully and not turned off / turned down at each radiator.
[helper]#7
The switch that goes up to 30 is the room thermostat. What should happen is the boiler comes on until the radiators have warmed the room to the temp you have set and then the boiler goes off. But it sounds like your radiators aren't getting warm enough to heat the room to the right temp.

There is sometimes a temp control on the boiler which controls how hot the water is warmed up at the boiler. There should be cover that opens with a dial inside - try switching that to max.

Also look at the name on the front of your boiler and google for some instructions on how to operate it. You will need this if the boiler ever goes off etc
#8
In my house the switch on the wall sets the temperature that you want the house to be at (i.e. 20 degrees) but what makes the radiators to be very hot or not is the knob that I have in the boiler. The knob has numbers from 1 to 5 and MAX during the spring and summer is normally in 2 or 3, but in winter that is not good I have to increase it to 4 or 5 or even MAX and this is what makes the radiators water very hot.

If your problem is that some parts of the radiator are cold but others are hot then you need to bleed them.

I hope this help.
#9
are the radiators hot at the bottom but cold further up,If that is the case then they have air trapped in them and need bleeding,When you open the bleed valve at the top this lets air out and allows the water to rise up to the top.when the water gets near the top it will start to spit out through the bleed valve so be ready to close it,Best to have somthing like a towel on th floor because any water that comes out will probably be black
Tony
#10
some of the radiators are cold at the bottom, but even the ones which have a constant temperature over the whole radiator are not hot. You can comfortably place your hand on one and leave it there it will never be too hot to touch. I will try to bleed them later. I did look ast the boiler last night but didnt see anything other than a tiny glass hole with the pilot light , no dials but ill look again tonight
#11
As stated do the easy stuff first,
put the room stat on full (30)
put the boiler temp on full (if you have the option)
check that the rads all fully open on both valves of each rad,
bleed all the radiators (especially the furthest and highest ones from the bolier)
could be a sticking y valve (not opening fully on the hot water side of the valve)
#12
u might need transco out, I had similar problem, my radiators weren't heating to their potential and my hot water was going hot and cold... plus my gas cooker was spitting.... phoned transco, they came out and sorted it as we had water in our gas pipes...ask your neighbours if this is a common problem in your area... in my street this seemingly always happpens in winter as it sits on a kinda slope... you should phone transco anyway see what they say
#13
cold at the bottom? I am sure a bleed will sort that, isnt that a classic sign for air in radiators.
Get a key and bleed them all... you will be suprised.
#14
like i say i dont see any problems with anything else. Water temp through taps is very very hot (provided water has been turned on for 30 minutes) and gas is fine through the cooker etc
banned#15
kristianity77;3727618
like i say i dont see any problems with anything else. Water temp through taps is very very hot (provided water has been turned on for 30 minutes) and gas is fine through the cooker etc

and turn down the temperature on your HW tank. The most common mistake is to have this set very high and add cold to the HW when you use it. very uneconomical to heat water in this fashion. Set it to about 50 degress and see how that works out.
#16
if you have thermostatic valves unscrew them and push the nipples down rapidly...sometimes they get stuck.
also tap the radiator valve pipe with something or even wack it a few times...
push the nipple down again and it should free it up.
put the thermostat back on the rad and it should be okay.
Worked for me...somethimes the valve just gets stuck..
#17
..pump
#18
owlass;3733599
..pump

My thoughts as well, do you know if your system has one? and best to store your water at around 60 degrees.
#19
A few things things, what type of system is it? pressurised or tank fed? Is it a combi bolier or do you have a separate hot water tank, is it a gas or oil boiler? any idea what model it is?

I worked for the gas company for 10 years and have now been repairing oil boliers for the last eight so if you can answer these i might be able to point you in the right direction.

It could be the pump, it could be a motorised valve, it could be air, it could be of things really

jayes1965
if you have thermostatic valves unscrew them and push the nipples down rapidly...sometimes they get stuck.
also tap the radiator valve pipe with something or even wack it a few times...
push the nipple down again and it should free it up.
put the thermostat back on the rad and it should be okay.
Worked for me...somethimes the valve just gets stuck..


very unlikely that all the rads would do that at the same time, 1 0r 2 yes but not all of them
#20
We had all new boiler and rads fitted throughout in September this year and although hot they dont seem as hot as they could be. All the thermostat valves on them are racked up to the highest point so after reading through here I went to check the temp control on the boiler and it was set to low! I have turned up to medium to see if that makes a difference! I bet the OH set to low to economise! :)
#21
well bled the radiators and they were all fine apart from one upstairs in the attic convesion which hissed a bit. Messed around with the boiler, and pulled off a panel which i didnt know was there and found a dial from 1 to 5 for thermostat temp. And lo and behold it was on 1. So moved it up to 4 and thats done the trick, hot radiators!
#22
Glad to hear you are sorted,You may want to have a look and find the model number for the boiler and ggogle it ,you may be able to find out the best setting for that boiler,
suspended#23
kristianity77
well bled the radiators and they were all fine apart from one upstairs in the attic convesion which hissed a bit. Messed around with the boiler, and pulled off a panel which i didnt know was there and found a dial from 1 to 5 for thermostat temp. And lo and behold it was on 1. So moved it up to 4 and thats done the trick, hot radiators!


Yay! pleased you got it sorted! :thumbsup:

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