Came out today to perform a leak investigation on a Lennox ac system. Model #XC14-036-230-07, serial #5814L01440. Upon arrival the homeowner stated that he has not turned the air on with the exception of last night due to the cool weather. I called for ac and observed the system starting normally. I let the system run for about 20 minutes and I received a temperature split of 19°. I powered down the system and began the leak investigation using an electronic leak detector. I checked all brazed connections, condenser coil and evaporator coil. I was unable to find any leaks in the system today. After speaking with PA as a courtesy I added 1/4 stick of uv dye. Chud will return in 2-4 weeks to perform leak detection. No charge for today’s inspection. Paid for on 4/14/23