All ActivityMost RecentMost LikesSolutionsRe: Coleman AC compressor won’t start@mxdad777, What was the solution to your problem below? I suspect you had to replace the unit or at least the compressor. My AC draws 40A for the 2 seconds that it does come on before shutting off. When I turn on the Thermostat the fan runs but when the compressor tries to start it hums real loud for about 1 to 2 seconds and then shuts off. It will try to start about every minute or so, but it only hums and then shuts off.