When it rains, water may enter your RV via your AC roof gasket. The roof gasket sits between the AC and the roof and sticks to the roof. The roof-mounted part of the AC is mounted on the ceiling assembly, and bolts are used to compress the gasket sealing the two parts together. Remove the plastic cover under the ceiling assembly and locate the four bolts. Tighten the bolts with the appropriate socket size. Bolts can often be compressed extra to reseal gaskets. If the bolts are already snug, the gasket may need to be replaced.
Drain pan overflowing
An RV air conditioning drain pan holds the roof portion’s components. As the evaporator coil cools, condensation drips from the evaporator pan. A drain hole on the roof discharges water collected in the RV’s drainage system into the drain pan. Your RV’s roof will be wet when the AC is running. A blocked drain hole causes debris to accumulate in the drain pan, preventing water from reaching the drain pan; as a result, water eventually finds its way into the RV. A crack in the drain pan or a cracked caulk can also cause water to leak into the RV. Nevertheless, this is a relatively rare occurrence. You will also need to clean the evaporator coils of the AC after removing the shroud from the roof portion.
Condensation occurs when warm air cools. It is common for condensation to form on almost any cool surface in the AC or ducting system in a hot and humid climate. These conditions make it difficult to accomplish much. A slower speed for the AC fan is recommended for RVers in order to prevent ice from forming on the evaporator and condensation in the ductwork.