They will use probably the Omron or perhaps the Massuse (original OEM) relays. Both types will fail again in two or three years in my experience. The encoder is not the issue, but if they replace it no harm will be done.
I have repaired mine firstly with Omron relays which worked OK for three or four years, then recently failed. The Fujitsu relays are working flawlessly, but to be truthful, it may be too early to tell re their reliability. But they are clearly better suited for duty in this application, unlike the Omron relays which the manufacturer states (on the data sheet) are NOT suitable for continuous duty. When I pointed this out to CA tech support, they never responded back.
I would check to see if CA will replace with the Fujitsu relays, or if you can purchase the Fujitsu relays and have them install. Or, you can replace the Omron's with the Fujitsu relays yourself after they complete the repair. They are mounted on a replaceable pc board that can easily be removed from the main board.
Another tip which may extend the life of these relays is not to use the volume ramp on turn on or turn off.