Just wondering if there are any hacks to control/alter the thermostat of central/ducted cooling units in my office? The cooling unit keeps throwing cold air all day long and by end of day I am totally frozen. :D
The cooling system is there for the general benefit of all the people you share an office space with; shutting it off, reducing the flow, or altering the temperature of the flow will cause your work peers more discomfort
I recommend that you (request to) move your desk, or (request to) fit something to the outlet that will diffuse the airflow/send it sideways along the wall/ceiling rather than putting you in a draft
If none of these are options, coming dressed suitably, or bringing clothes (or a huge, wide-brimmed hat, like a sombrero - sufficient to shade you from the draft?) with you that you can wear to help you withstand the cooling effect of the airflow could be an option, as could requesting a transfer to another department or leaving your job as a last resort. Employers ought to have a duty of care to their employees, including providing an environment that is a sensible and comfortable working temperature for the type of work being undertaken.
Talking to your boss should be the first step here though
Is it one specific area or the whole office? If whole office, you are at the whim of your colleagues, boss or HR.
If localized ...
The office thermostats are often thought of as placebo devices or "broken". But in our large open office (5000+ sq ft floor plate), they had 1 thermostat per damper, each zone covering about 400 sq. ft.
Having one thermostat set slightly (-1-2°) different to the rest meant one continuously tried hard to cool (never getting to the set point) while the surrounding ones negligibly warmed or worked normally.
Setting them all the same temp solved it! Better if you can also calibrate the displayed temp on each against a portable thermometer. HVAC pros can also balance for areas getting direct sun, etc.
Blocking vents or directing airflow can make things worse!
In engineering offices where I've been a guest, this was usually solved with cardboard and duct tape, to divert the cold air flow away from the poor soul sitting next to the vents.