This reminds me of the weird AC behaviour at one of the London office buildings I used to work in. The AC or heating would turn on or off seemingly at random and when enough people complained about it (i.e. our CEO got sick one more time) it was revealed that the building is managed remotely by a company from Iowa and the thermostat that controlled our building was installed in their office and not in London. I was glad my contract ended and was not interested in renewing.