sorry joe....but I got news for you.....by turning your heater ON...it will COOL your engine down...NOT heat it up....as the heater is using the heat from your engine...and the fan blowing air across the heater coils REMOVES heat from the water/engine coolant inside it.....this COOLS off your engine....not heating it up...
SO.....just as a reminder to any of you....if you find your car ever starting to run hot during the summer time...or anytime for that matter.....turn on your heater and run the fan full blast....open your windows if you need to....but it will help....
I had to use this trick once a long time ago...but it got my car down the road a few hundred miles when I was litterly in the middle of nowhere...and to where I could get a few tools to pull out my thermostat...which froze partially open...but not far enough.