The ticking noise is the fuel pump running. On the gas and quiet diesel series onan gensets, holding STOP primes the system by running the fuel pump without initiating a start - most commonly used after replacing the fuel filter to re-prime. In your case there is most likely, as muddypaws suggested above, a remote start/stop switch that is stuck in the STOP position. If I find a coach with this problem it's generally the start/stop switch located in the bedroom next to the bed and something has wedged against the switch, such as a comforter or pillow. It is also possible a switch has been damaged by being struck with something accidentally, or there is a short in one of the remote buttons wiring due to a staple, screw, etc.
94-Newmar Kountry Star 40-KSDP
Spartan/Cummins 8.3C-300HP/Allison 3060 WTEC-II/25yr RV Tech RVIA Certified/Onan-Cummins Certified