Fall pm on 10/30/ 19 On arrival I sanded the flame rectification probe and checked burner arrangement the ignitor homes out to be in good condition checked all other electrical connections set unit to call for heat measured supply and return air temp measured voltage and amps inspected electrical connections checked drain and cleaned checked filter and replaced checked blower motor checked all other electrical connections checked temp rise DT 51 made for hi 45-75 low 30-60. unit tested unit operating normal at this time. Recommended Uv lights installation and Ez trap installation to avoid future problems.