UPDATE: Took a little longer to do the capacitor fix as we had a cold front here in Colorado. Did the capacitor trick earlier today and so far so good. Temp seems to be much more stable, just waiting for the tub to get up to temp.
Same problem just started tonight. Luckily I have a couple of these caps on hand. I'll toss them in tomorrow and report back!
Sucks that I have to drain the tub to do this!