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Is anyone else too hot at night with a combi boiler?

90 replies

PerkyOchrePeer · 03/04/2026 01:31

How do people cope with sleeping at night in bed under a duvet with a combi boiler. I am too hot even though my thermostat has been turned right down a d it's so uncomfortable. I hate the boiler i did not ask for it because my housing association just gave it to me and I had no choice but IM unable to sleep because I'm too hot even with the temperature turned right the way down. I just can't cope with this anymore.

OP posts:
Blimms · 03/04/2026 03:04

But in the first photo there is a very clear reflection of your face and so we can clearly see what you look like. I was just giving you a heads up.

RokaRocker · 03/04/2026 03:09

As your thermostat photo shows it is 5 degrees outside so open a window. Unless this an odd stealth boast about how good your house insulation is.

Blimms · 03/04/2026 03:22

OP, I’m going to report your thread, not because you’ve done anything wrong, but because that image appears to identify you and I don’t think you intended that. You also seem a bit confused, so you may not realise that it’s revealing.

NiteWotchaNightwatch · 03/04/2026 03:37

Hi @PerkyOchrePeer

Night Watch here.

I’ve hidden the photo you posted as your face was clearly visible.

hope you’re okay Flowers

RoseField1 · 03/04/2026 03:38

I don't understand how the boiler is making the house warm when the heating is switched off? Are any radiators in the house emitting heat?

BeBesideTheSea · 03/04/2026 03:45

You seem very confused. Have you got a Carbon Monoxide monitor? A boiler leaking carbon monoxide can cause confusion. And it can be deadly.
Please open a window immediately - it will cool down the room and let out any fumes.
Then make sure you get a carbon monoxide detector tomorrow.

Meadowfinch · 03/04/2026 03:55

Op, if your radiators are off then there is nothing heating your room. It has nothing to do with your combi boiler.

It's spring, it's getting warmer so you could

  • Turn down the heating during the day
  • Move to a 3.5 tog duvet
  • Open a window
  • Switch to summer pjs - thin woven cotton or linen

I hope you get it sorted.

Nat6999 · 03/04/2026 04:05

I'm laid with my fan on full blast, it's like an oven even though the heating went off at 7.00pm.

Meadowfinch · 03/04/2026 04:27

Op, do you live in a flat? Is the heat coming up from the flat below? Is your downstairs neighbour a little old lady who feels the cold?

Marooney · 03/04/2026 04:42

@NiteWotchaNightwatch the photo is still up

NiteWotchaNightwatch · 03/04/2026 04:53

Marooney · 03/04/2026 04:42

@NiteWotchaNightwatch the photo is still up

Blimey, I hid the wrong post Blush
thanks @Marooney

its gone now

TulipsDaffsAndSunshine · 03/04/2026 05:05

Turn it off!

endofthelinefinally · 03/04/2026 05:25

How old are you OP? Could you be having a hot flush?

endofthelinefinally · 03/04/2026 05:31

If it is a new boiler the engineer should have fitted a CO monitor at the time the boiler was fitted.
I have a combi boiler. I just turn the thermostat down and the heaters don't come on. I keep it switched on so we have hot water. The smart meter shows no gas useage unless I turn on hot taps/ shower.
OP what is the temp in your room? Do you have a room thermometer?
Have you taken your body temp?

Mt563 · 03/04/2026 05:48

If your radiators are off, this is not a boiler problem. Do you live alone? Is there someone else who can help check things over and set them up how you want?

Allmarbleslost · 03/04/2026 05:53

I don't think you understand how heating works. If your radiators are cold it's not the heating making you too hot - the heat comes from the radiators.

frenchnoodle · 03/04/2026 06:28

Combi boilers only heat water when it's moving around the pipes (so when the radiators are working or the hot tap is on). If your radiators are off it's not what's making you hot.

tnorfotkcab · 03/04/2026 06:46

How is the boiler heating your room when you say the radiators are cold?

auserna · 03/04/2026 06:57

PerkyOchrePeer · 03/04/2026 01:56

Yes but that was because the thermostat wasn't set up. Now it is set up the way these boilers work is that you have a censor outside, which gives an inside room, fixed temperature. And then if you are sleeping at night, Anthony's a duvet with the room fixed temperature, you will feel even hotter even when you have turned the thermostat, right the way down, so you cannot get any cooler. I absolutely hate this, and I wish I had an ordinary boiler because I don't likshe these boilers.I think there a load of rubbish

When I looked online to find out what would happen if I switch the boiler off altogether, it's said that if you do that, you will cause a burst pipe or you'll cause the be boiler to malfunction, so it's best to keep it on. My old boiler was not a combi boiler, and it was much more suitable to my needs. When it broke down, landlord decided to give me a combi boiler and said this is what you need, and I had no choice.. i would not choose to have a Combi boiler, in a million years, I think there are loads of rubbish.

Edited

Can the censor stop people posting nonsense on Mumsnet?

Love that you have a duvet called Anthony.

auserna · 03/04/2026 06:59

PerkyOchrePeer · 03/04/2026 03:03

How dare you say that I do not drink alcohol

She's not saying you don't drink alcohol, she's asking if you're drunk.

Ginmonkeyagain · 03/04/2026 07:09

A combi boiler is a gas boiler that heats water directly without the need for a water tank and also operates the wet heating system (eg the radiators). You don't need to do anything about the water, the boiler will automatically start when you switch a hot tap on and stop when you switch it off.

Separately you should have a thermostat that allows you to control the heating. If you are too hot, either turn down the temperature or switch the heating off altogether. We never have the heating on at night. Don't worry about pipes, modern boilers have frost protection which means if the temperature inside yoir house falls below 5 degrees the heating will come on

We have a Valliant combi boiler and it came with a portable thermostat that allows you to control the heating separately., see if you have somethig like that (our boiler is 12 years old so I assume these days it may be an app or something).

Notmyreality · 03/04/2026 07:13

I really try but with some people I just despair.

Notmyreality · 03/04/2026 07:17

It just makes no cense. 🤷‍♀️

DistractMe · 03/04/2026 07:34

auserna · 03/04/2026 06:59

She's not saying you don't drink alcohol, she's asking if you're drunk.

I think there should be a full stop after "that" and the OP is saying that she does not drink alcohol.

I really dislike sleeping in a heated room, so whatever is causing the problem, I sympathise OP. But we have a Vaillant combi boiler and, like many other people in this thread, simply turn the thermostat down at night. Are you sure you have your boiler set up correctly?

Tillow4ever · 03/04/2026 07:50

Probably next you fall out with your heating over WhatsApp now OP…. I take it you have no friends left to have weird fallouts with to post about on Mumsnet so now you’re on weird stuff about a boiler that’s not even got the radiators on making you too hot.

Combi boilers are great. They mean you always have hot water, where was with a separate hot water tank you are either paying to heat water you aren’t going to use (and keep it warm) or you run out of hot water. The boiler itself doesn’t emit any heat. The thermostat should be inside, in a room not in direct sunlight or that gets exceptionally hot or cold, and your temperature settings will be based on this. So set it to 18, and when the room that thermostat is in reaches 18° the heating will turn off. I wonder if the outside sensor is to do with frost protection, so if the temp out there drops below 5°, the heating turns on to protect your pipes from freezing up. If you don’t have any pipes going outside, I can’t see why the thermostat would be measuring outside temperature. Also, if it was measuring the outside temperature, your heating would have been on, which you say it wasn’t?

I’m afraid we are getting to that time of year where it just gets too warm in bed at night. Houses are too well insulated when it comes to the hotter weather sadly. I always have the window open and a fan (or two) on at night due to menopausal night sweats. You might want to give that a try, but I promise it’s not the boiler.

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