AC only works on high

[TSrammers]

Hi people, not to sure what’s up with my ac but it doesn’t work unless you have the ac on full (4), anything below doesn’t work, I’ve been told by some people that it could just be the Blower Resistor but wanted to get some other views on what it could be. 

Thanks Tom

[Trewithy]

Does your blower work on settings 1,2,3 and 4 and the AC only works on position 4? or is your blower not operating on any setting except 4? If its the latter then it most likely is the blower resistor, a common fault.