i would look for the wire that goes to the arm itself or check to see if it is on it's own fuse.
Could be heater core leaking Could be a bad windshield seal Could be a bad door seal
No. You have either a leaking heater core, or a leak at the windshield.
Heater core / hose leaking.
Leaking windshield or clogged windshield cowl drain lines.
Heater core leaking? Windshield seal leaking? Door seal leaking? Evaporator drain plugged?
Leaking heater core.Leaking heater core.
The heater core is leaking coolant.
On ours, it is behind an access panel in front of the RH tire.
The drain line for the cowl is stopped up or the windshield is leaking.
you could have a heater core leaking or your windshield is leaking and the water is running down behind the dash and onto the floor.
your windshield seal has failed
Typical of the heater core leaking. Overheat because of low fluid and pressure. Foggy windshield due to heater core leaking and will smell antifreeze in the car.