[quote]
Well, when the pool dude came out to replace the light they realized there is a kink in the conduit and it’s going to require breaking through the patio to find the kink and repair it, then replace spa light, then repair patio.e [/quote]

The problem you described is unclear. Why is the pool repairman messing with the conduit rather than simply replacing the light? Were the wires determined to be bad/shorted and subsequently removed all the way to the equipment? The fact that wires were successfully fished through during initial installation suggest no kinks or blockage. Further, electrical conduit cannot magically develop a kink lying dormant underground, nor is it possible to assemble with a kink as elbows have generous radiuses.

A blockage is possible from dirt entering at the openings during installation or seeping into a failed joint due to improper gluing (roots unlikely due to no water). You might try flushing out the conduit using high pressure water first. Another option is to rent and run a borescope into the conduit to pinpoint the blockage followed by contacting a plumber to inquire if a tool exists small enough to snake it. This may minimize tearing out the old patio. Personally, I would not tear out a patio for a spa light even if costs are recovered. I’m picky on fit and finish and the replacement concrete will never match the original. If possible, I would rather dig and lay new conduit and move the spa light as a last resort. Good luck.