For this call I performed this is for tune-up. I recommended resealing all ducts to the supply plenum, adding a UV as a preventative measure for Bio growth, installing either a soft start device for compressor longevity working as a surge protection as well or installing a compressor saver with a unit search protection, and adding a drain switch to the primary drain line to prevent water damage if there were to be a clogged drain. Homeowner is considering having some of the work done but needs to think over their options and requested a email of the estimates. Thank you for choosing Comfort experts, have a great day!