For this tune up, I inspected both inside and outside Upon revision, uv light bulb was out and mentioned to home owner about replacing, homeowner asked me to bring it to her so she can look at it, upon moving light bulb it came on, results that it had came loose and after doing that I told homeowner that she doesn't have worry about it until next visit Electrical and refrigerant levels are good to go for the summer Thank you for choosing comfort experts, have a great day