Basically went to turn my booster pump on today and nothing happened, changed fuse etc still nothing... So i turned water off and tried it and it worked

So turned water back on and started struggling then cut out again.
So took apart my housings etc flushed system etc then tried again and still
It sounds like the pump is struggling to push the water through the R/O, but when ran dry the pump runs perfect(i only run dry for a second to check its ok)
Which leads me to think there must be some blockage in my R/O... I have a feeling is the filters before resin? Any ideas???
I bought it from Colin's water products about a year ago and changed the filters 2 months ago (i only make 2000L a week so wont be due again)