Arrived at customer's house for system inspection. On arrival customer showed me to 2 air handlers and the attic. Inspected 1st air handler and saw and saw A UV light on but the bulb was past due. Brought this to customer's attention but customer does not wish to change bulb at this time. the unit was equipped with a float switch. Tested float switch and float switch does work. Unit was producing proper Delta T. Under evaporator coil was clean. Next checked 2nd air handler. This unit was also equipped with A UV light with a bulb past due. Again suggested this be changed out but customer is not interested at this time. inside of cabinet had some biogrowth. Both units have UV light on supply plenum. Installed a float switch on this unit and tested. Float switch is working. Next went outside to condensers. Both condensers had contactor sending proper voltage, but capacitors were below name play rating. Pointed out to customers and told dangers of ignoring this. Customers decided to chang