Sounds like they are trying to give you the brush off, ask them what's involved in servicing the Suntour system. I'd be surpriced if it includes stripping and cleaning the TS components, but I could be wrong. The electronic part is a sealed unit, so no way of servicing it. There is of course the chance that a good clean will bring it back to proper working condition, as it still sounds like it is working, albeit not as it should. I'm not sure the same can be said of the other faults on the bike. In post #57, Brynric states he had his TS cleaned and it cleared the fault code, for free after 3 years, I assume for the first time.