Before I go drop a hundred bucks on a new GFCI breaker, please let me know if I'm thinking correctly:
My pool, pumps, and electrical equipment are all only 1.5 years old. I have 4x 240V pumps, each with a unique GFCI breaker in my pool panel. This morning, I noticed that one of my pumps wasn't operating, even though my control panel said it was. I checked the electrical panel and found a tripped breaker (let's call it "A") that would not reset. After disconnecting power to my pool breaker box, I wired a different pump ("B") to the tripped breaker. Breaker "A" would still not reset. However, when I hooked Pump "A" up to Breaker "B", Pump "A" worked just fine. This would imply that both pumps (and their associated electrical wiring) seem to be OK, so Breaker "A" is suspect. I conclude that purchasing a new breaker should fix my problem.
The breaker is a Square D 20 Amp Two-Pole GFCI Circuit Breaker. I don't mind spending $100 to replace it, as long as it's really the problem. I would rather NOT spend the hundred bucks and then later have to call out the pool electrician if this does not get me operational.
Are my approach and logic correct? Thanks in advance.