Thanks for the reply.
In the past, mine had taken a few tries before the relay would latch on, but would eventually work. Recently, I had some work done at a dealer. They replaced the power converter as part of the work, and when I tried to turn on the power at the disconnect switch it would not turn on. The dealer said that the battery had just gone dead and they needed to charge back up, but even after driving for over an hour with the generator running the battery disconnect would not turn on. I only had DC power with the generator running or shore power plugged in. I checked voltage at the batteries and it was good. That's when I checked the relay fuses and banged on it, and it started to work intermittently.