Dometic RM 2662 leaking yellow fluid

We began hearing a "sizzling" type of sound coming from our refrigerator tonight, a Dometic RM 2662 in 2004 Classic. Traced the sound to rear of the refrig when we open the outside panel and could also see what appears to be a yellow fluid leaking. I could not see the exact source of the sound, but definitely coming from the refrige. My wife thought she could smell wiring, but I could not. We have turned the unit off, and would appreciate anyone's opinion on what could possibly cause the noise and apparent loss of fluid. The unit was running on AC, and had been working great. I did an online search of our model and discovered there was a recall for model and serial number that involved a fatigue crack in the boiler tube. Also, we are currently in Phoenix and would need to have it looked at, would appreciate any recommendations for service.

Thanks