In 1986 I had a Carrier heat pump put in my new home. From the very beginning, it leaked freon. I had the HVAC people there once a month to repair the problem but despite replacing all the lines between the inside and outside units, the leak was never repaired. In 1996, I replaced the entire unit, inside and out and all of the lines, with a new Carrier system and a new HVAC contractor. It leaked too and still does. Are Carrier units proned to leaks or am I just lucky enough to buy two different units that leaked?