A home or RV that sits closed through a hot summer can have problems show up on startup: a clogged drain, a failed capacitor, nests or debris.
Before you arrive, run the system for a while and watch for warm air, water or tripped breakers. RV owners should note the unit make and model and how many units there are. We don't service vehicle dash AC.
Possible causes include airflow, a disconnected or damaged duct, a closed or blocked register, sun exposure, insulation, or equipment that doesn't fit the home's layout.
The cause can only be confirmed by checking the system and ducts together. Note which rooms and what times of day it happens.