6200 problem

[twon8]

i have a 6200 that i am now certain is not changing speeds.

i have two 6100's and the 6200 on mulitcontroller, and while i can feel the difference in flow on the 6100's as they go from 30% to 100%, i can feel no change on the 6200.

is it possibly the controller? or more likely to be the pump?

i have had it about three months, bought used on rc, so im sure its not under warranty, but i'll pay whatever is required to get it fixed.
thanks
anthony

 

[rvitko]

Often this is just a bad cable- try another cable. It can even be just a loose connection.