Came out today for a Lennox heat pump that has a leak in the condenser coil. Lennox heat pump model #14hpx-030-230-22, serial #1918j10671. Upon arrival the homeowner stated that another company came out to investigate the system not operating (through the home warranty). They charged the system with nitrogen and told the homeowner he had a leak. Upon arrival the system had a slight nitrogen charge and I could hear it leaking. I used micro leak bubbles around the area that was hissing. Sure enough there is a leak in the elbow of the condenser coil. The condenser coil will have to be replaced and the system should be covered under the manufacture warranty.