blower problem-HELP

[skeebo23]

i have a 1987 fleetside with factory a/c, blows cold
on low its very low, on medium its a little better, on high speed a little better, but not nearly what it should be! Since i am getting a minimal change in speeds while changing the switch, i feel its not a resistor or switch, but cant figure why not blowing better????

[tucsonjwt]

You might check the other thread on this blower issue going on right now. I have found the fan switch and harness to be the culprit, but there are other causes mentioned in that other thread. When you say you have minimal change in speeds when moving the fan switch, are you sure that you don't have NO change in speeds, and it just seems like a slight change in speeds?

[skeebo23]

u can tell a noticeable difference, at low, you cant tell blower is even on, at medium, slight air flow, and at high, you can feel much better flow, but is NOT near what it should be