Test of system finds overflow pan full of water, water is then leaking out of pan due to it being rusted through. This would require the furnace to be uninstalls to replace. Replace pan with new lift riser with labor (price provided). This is only one part of the problem. The water is getting into,the pan because the plumbing is clogged. I cut my small drain line at the coil and cut it at the plumbing stack and cleared my drain line. I then pumped water out of the drain pan down the line. If the problem persists and water doesn't stop leaking within a couple of days , you will need a plumber to address plumbing issues, possibly rerun all plumbing pipes smother run downhill towards plumbing stack. Many pipes run uphill ( i.e. At hot water tank, vent pipe, overflow pan pipe,,etc,) and not downhill towards drain at plumbing stack. Have plumber out of needed and then have drain pan replaced to prevent further issues in ruining drywall ceiling and insulation. Please once fixed have