Replaced blower motor, about 2 years ago. Today is was raining heavily and drove for 2 hours, about 15 minutes from home it stopped blowing. Was running on low heat, defrost on high fan. Fuse?

SOURCE: Blower motor location and installation on 73 ford gran torino

It's less than foot from the heater core. I would guess that either the damper doors are not on correctly or the vent hoses are not hooked up. Can you hear the blower motor running? Maybe they didn't hook the motor back up when they replaced the heater core. It takes a ground and a hot wire.I can't remember where it's at but it may be part of the same unit. Did you check the fuse?

SOURCE: 1998 Pontiac Grand Prix Problem. 5 speed a/c

I'd say that your blower motor resistor has shorted internaly.

SOURCE: 1997 dodge intrepid heater/ac fuse keeps blowing

I have a 96 Intrepid, and none of the signal lights work. I tried replacing the fuse, but this did not remedy the problem. Could this be a loose connection?

SOURCE: My 2001 525i BMW has stopped blowing heat/ac. I

could be 3 things. The fuse, the motor, or the resistor. Just because it was replaced doesn't mean it won't go bad. It went bad the 1st time. Fuse is more common. As is the resistor, oh and a 4th item...the relay.. Rare for that one to go out though.

SOURCE: My 1999 Ford Contour's fan blower is having some

you are right on the money, start with the resistor