kicker

you really need a plumber in there to help.

im not clear onwhat the electrical is for.is entire house heated by boiler,when was boiler last serviced? i usually tell people to flush the boiler atleast once a week on smaller units to keep sediment cleaned out.

Are you talking about a toe kick heater with a fan? It is a hot water system with a thermostsat. When temp is met, a fan should kick on and blow the heat into the room,,, maybe the thermostat is bad and the fan is not kicking on. GMOD

If your Fan is coming on & you are not getting as much heat out of it, you most probably have a restriction. They are usually plumbed up using a directional "monoflow tee" which has a baffle in it & that might be where the restriction is....................... anyhow you will have to call a plumber if the fan is operating...............

Check blower operation, obstructions-vacuum out dust. Some models have a blower on/off hi -lo switch.
Independent thermostat for that room, which would control blower?
No blower, check electrical connections, circuit (electrician)
No heat in pipes , beyond bleeding checking if there are shut offs for that branch, you need the plumber.