I have a Rainsoft whole house carbon filter with what is probably the "brass valve" system. It was installed in 2000. The timer and backwash function has been a problem for many years. Multiple repair trips with no permanent resolution.
I have been manually backwashing by connecting 24V power, turning the timer knob until the cams/plunger rotate to the correct position (multiple steps), disconnecting power to keep everything in the backwash position for the required time, reconnecting power and turning the knob to start the wheel rotations (multiple steps) and disconnecting the power at the correct resting position. It's been a pain in the arse, but at least it has worked and the time off from work and the service charges stopped.
Now the timer knob has frozen and won't turn. Can I pull the timer guts out and still turn the white cam wheels by hand to move the plunger(s) to still manually backwash?
Also, when it comes time to fix this permanently, what are my DIY "upgrade" options. I have read this entire post but I am not clear on the upgrade path (TC upgrade, Fleck timers, etc.).