can not start generator

i had generator running continuously for about 3 hours on a very hot day just so i could make sure my ac was functioning properly before i headed out for a weekend get away.everything worked fine.so i shut it down and when i tried to start the generator up the next morning i could not make anything happen with it.pushed the start button on dash and got no sound at all.tried the other switch that is located near the kitchen sink and got nothing there.went to the switch at the generator compartment and no luck there either.usually it would roll over and start immediately.went back to the switch located on the dash and pushed it again.this time i heard a noise coming from somewhere around the front of coach that kinda sounded like a clicking and it kept on making that noise after i let go of the start button.then it quit making any sound and does absolutely nothing again when attempting to start it.engine starts and runs fine. batteries work the lights.help!what can it be?