After 4 years of service, I just tried to change the setpoint on my Johnson temperature controller and pushing the menu button had no effect.
I opened it up, and I can't see that there's any visible issue. The menu button appears to be mounted on the circuit board just like the other two. It clicks just like it always does when I push on it, but it doesn't bring up the menu on the display.
Anyone encountered this before? I figure it's probably toast.
Fortunately, the beer I brewed today is a tripel so I think it will be ok if I just let the temperature rise to wherever it wants to go (I pitched at 61 degrees).
I'll have time to buy a new controller before my next batch if necessary.