Air Conditioner in toy hauler keeps drawing more amps

The filter protects the cooling heat exchanger from dirt dust pollen etc., but there is an outside air exchanger that dumps the heat, that is less well protected. As air flow is restricted, temperature and pressure increases loading the compressor more.

The most effective cleaning is with a medium velocity flow of water in the reverse direction of air flow. A high velocity flow will bend the fins over and plug the core.