Welcome GA Navigator,
Nice to see another HR owner posting. We love our 1994 40'. Ditto here on the basement A/C noise but the tradeoff is that you can almost turn the entire coach into a refrigerator, it gets that cold. Relays on the circuit board are a problem though, weak and sometimes stick. We had our issues with the lights and had to replace some ballasts.
These are excellent driving rigs with darn good mpg. Overall very happy with this one. Good luck with yours!
1994 40' Holiday Rambler Navigator (Jenny II)
Chevy Tahoe following very closely