You should post more information than this. The blower (yes it's supposed to be on) moves air. Air is hot, it's July, but it could get hotter if it blows through the heater core. That hot/cold lever on the dash is supposed to control that airflow. If you have hot air coming out of someplace, then tell us and tell us what that place is. I know you have A/C, but you should reveal that too and tell us it doesn't work. Can't you make the hot air blow out of the dash vents? Defrost? You need to convince yourself whether or not it is coming from the heater. If so it may be a lot of trouble to fix.
While driving my Pontiac (1977 Grand Prix), I notice that I can feel a
> good amount of heat coming through the firewall. The engine doesn't
> overheat or anything but I do notice that the blower seems to run at a
> slow speed even while it's turned off. I've been told that a
> consistent blowing blower is normal but I wouldn't think it's supposed
> to give off a lot of heat. Does anyone out there know of a reason this
> could be happening? Thanks in advance
>
> josh