heater fan

I don't have a sketch to share, sorry to say, but I can tell you that you are likely looking at an intermittent blower motor resistor and / or wiring connecter issue. Should be under the passenger side dash in line with the wiring to the blower motor. Good luck...and thanks for finding RepairPal as an octogenarian!

if the heater fan was making noise (bearing) prior to stalling. tap the bottom of the shroud and it may go back on . sooner or later it will stop completly.