|Platinum Cat Heater - Model 6P12|
Since this was one of many systems on the boat that I was unfamiliar with, I initially thought that it was operator error. But, after some digging, and posting to SailNet forums, I was confident that I was doing it right. It apparently really is as easy as turning on the power and turning up the thermostat. But it still didn't work.
I dug around and figured out that the heater is from a company called A&L Enterprises. I reached out to their generic email address and received a quick response from Arnie. He explained that the model I have is an antique from the early 80's. I wasn't optimistic. Surely if it was that old it would be unserviceable.
Arnie proceeded to send me several manuals, service updates, and detailed troubleshooting instructions. After a bunch of back and forth I solved the problem. The fan blower was rubbing on the housing and causing it to fail. Happily I now have a great working heater!
The service from A&L Enterprises was exceptional. They could have easily told me that it has to be replaced, since it was so old, but they didn't. When I do need to replace the unit, I know where I'll be shopping.