Arrived to for poor cooling. Checked system it’s working properly at this time. Found attic fan needs insulated and sealed off pull down staircase needs to be sealed with a jacket install new gable vent and thermostat. This will help with the air conditioner keeping it cooler in home. But explain to customer it’s only designed to keep it 20 to 25° difference from outdoor temperature. Also explained to the customer he needs upgraded windows for the home. Gave him option. Customer paid down payment of $2139 they will pay $2138 after work is completed. Told customer we would schedule this work to be done in the next week or 2 week.