2015 r410a heat pump system has lost 1/3 of its charge since last service on August 30th 2024 requiring 39 oz new R410A for full pressure operation. Ultraviolet dye leak search inspection inside and out could not discover any dye at this time. System has had multiple doses of dye and leak stop. one added today and one on record in 2022. Recharge only with dye and leak stop today 39 oz new R410A System has been recharged once a year for at least 3 years with visual dye and electronic leak searches performed each time. Permanent repairs will require the extraction of all the refrigerant and nitrogen pressure testing to isolate the single components inside and outside