I'm in a house that has steam heat (or it at least has a boiler and some kind of water-based heating) and the very small profile baseboard radiators along the walls.  The thermostats are both set to 80 degrees Farenheit and the temperature of the house is about 58 degrees upstairs (main level) and 65 downstairs (basement).  I have a space heater running near the basement thermostat.

I examined the boiler but to me it isn't obvious there's any problem. It periodically makes some noise like it's doing something, and the pipes coming out of it are hot enough to burn me.  The gauge on the top says 225F and ~24PSI.

How can I safely "reboot" this so that the baseboard radiators will start radiating?  The heat worked last winter.  Is it possible there's some circuit breaker or something that has to be switched on when the seasons change?  The house also has the sort of AC where there's an external fan unit and a cold air blower in a few of the rooms.