Hi all- looking for some knowledgeable advice on the temperature in cabins. I travelled on a YYZ-LHR overnight recently. There had been something up with the electrics as the entertainment did not work until about an hour in, which may have had a knock on effect on the cabin temperature. The cabin was incredibly hot and stifling, the worst I've ever experienced. The vents above us were not issuing any air that could be felt. My husband suffers from a rare condition known as cluster headaches that can be brought on by excessive heat. Therefore he asked an attendant to look at the vents and if anything could be done about the heat. First time the attendant put her hand under the vents and told us no, the vents are just poor and don't work very well (plane was a Dreamliner). Some time passed and we were both really struggling and couldn't take any more clothes off so we tried again. This time they said again that the vents were working as normal and they would "try" and do something about the temperature. Around an hour after there was no change and a lot of pax round about us were waking up and stripping off layers of clothing. We flagged someone down again and they said they would go and lower it. On the fourth ask the attendant advised that the temp had been turned down to 23 degrees, and the implication was that this was incredibly rare and unusual. We were advised policy dictates all their aircraft are maintained at 24. We then got the "noone else is complaining" tossed at us and the attendant walked off. We were both visibly red and dripping with sweat, however to be fair we did see people asleep with blankets over their down coats (no idea how they were managing as I was ill in a vest and light trousers) so I understand we weren't the only ones to please. However, surely it is easier to warm up with the provided blanket then cool down? Is it honestly right that an Air Canada cabin must be at 24 degrees? That seems way above room temperature to me and I'm a cold potato. Unfortunately my husband then did get a bad headache so had to go to the galley for an ice pack- they looked after him well enough.

Turns out an hour before we landed all the air vents magically turned back on and we were blasted with air so the initial official AC comment of "nah that's normal, the vents are just poor" was just a lie/attempt to get us to shut up. A disappointing flight experience all-round.