Garage’s are not ideal places for appliances although because of a very small kitchen I am forced to keep my freezer, tumble dryer and washing machine in my garage. As far as I know all washing machines sold in the UK are the same as far as temperature goes. They are all designed to be installed in kitchens or utility rooms. The main problem I would envisage is if the temperature falls below freezing where it could freeze water in the fill valves and hoses. I have seen flooding caused by a cracked water valve. I would not expect issues at around 5° although maybe the electronics don’t like it.

Another possible source of your problem could be condensation forming on the electronics. It is possible and other washing machine might perform better worse more the same it all depends on how it is designed. The only thing that could suggest is to buy good quality one but as I say I am not aware of any specifically designed to cope with conditions in a garage. Good ventilation may also help.

However, I have since had a related problem. My Washing Machine works perfectly well most of the year, but every winter since it has been in the garage it becomes temperamental. It does not function well when the temperature is below 5 degrees (or there abouts). I wish to purchase a new machine, but I don’t know which models/makes work well in the cold (of a drafty garage). Any advice? Any recommendations?