Question about my heater/AC unit
 

Hey guys.

I have a ..
1993 blazer 1500 full size 2dr 350tbi 5spd stick...

my question is,
when I use my heater this little guy kicks on about every few seconds.. When it does this my engine studders fir a second.

should this be happening? Do I need this thing if i don't care about AC?
Can i jsut unplug it and move on with my life?

Thanks for any advise..

http://i31.photobucket.com/albums/c3...azerengine.jpg