Return visit with Lennox field representative to access issues with high efficiency Lennox outdoor heat pump. Performed different diagnostic testing and determined the compressor is not pumping. There may also be an issue with the expansion valve based on previously stored diagnostic codes. Based on these â€œmajorâ€ failures with a new piece of equipment, Lennox is going to follow up with us to let us know what the next step is. N/C, WARRANTY for diagnostic work today. ***PA will be in contact with the dealer and follow up with homeowner.*** ***Parts â€œ22F37â€ and â€œ11Y29â€ will need an RGA slip and need to be returned to Lennox Bensalem.*** M#EL18XPV-036-230A01, S#5821C15561.