The first night we enter this room, we found the air conditioner didn’t work properly. We contacted households and checked almost everything we can do. Household also don’t know what happened and let us wait for next day. However, on that day the temperature in Venice is 32-35C, we can’t fall in sleep without A/C in such hot and wet weather.
Next day household just tell me try a little switch to open all three A/C. I was thinking why he didn’t tell us that night? Although he discount us one day travel tax (€4 for each tourist per day), I don’t think this is enough to compensate us.