The orange light should only relate to the gas side ignition. Are you saying while switched to gas the burner did not come on? That would be a loud sound.
Electric will take quite a while to heat the water so 20 minutes was not really enough, but you should have at least felt warm water in the time.
If you have had hot water from the gas side since winter the bypass is not the problem.
Were you plugged into shore power while trying the electric side?
WBCCI 12156 AIR 3144 WACHUNG TAC NJ6
2004 Excursion 4x4
1991 34 ft. Excella +220,000 miles, new laminated flooring, new upholstery, new 3200 lbs axles