What type of CL do you have, some do need to be primed, depends on how it is plumbed.
Now first question, you plug it in, does the Motor sounds like it is running? Does it hum? You can take it out & remove the Pump housing, sometimes when sitting a long time, the seal will rust some & may be preventing the motor from turning. Gently turn the impeller to free it up. Clean it while your at it, use a little Vaseline on the O-Rings & then gently re-assemble the unit, careful not to over tighten the bolts on the pump housing as not to crack it.
If you have power & all that doesn't work, then you can look up the number to Ree flow & call to set up a repair, I'm sure they will fix it very reasonably.