Cental A/C only 10-degree temp drop
Actually, looking for help on 2-questions: One, is I've heard on many occasions that Federal Law requires 5-year warranty on freon leaks. Yet, careful reading on my new 2.5ton Rheem SEER14 Package Heat Pump 10-year "limited" warranty does not cover freon leaks, at all. Mine is only Year and Half old, and will not cool small 3bdrm house, that old 2-ton Carrier used to easily keep cool. When I called Contractor for service call, he found low freon, looked for leak, then added freon, but only had 10-degree temp drop. Unit had been running all day long. Also, had 10 inch insulation blown into attic and all new Hi Energy Windows installed. Then sent bill for over $300. I thought this was covered by Federal Law 5-years on freon leaks?
Second question is why only 10-degree temp drop? I have Universal Freon Liscense, from back in 1995 after 3-days schooling and then take test. And have worked on many heat pumps, window A/C's, cars, etc. Serviceman agreed this temp drop was not right, and said to let it run couple days. That was 2-weeks ago. Still the same.
Only 2-answers I can figure is: Air flow to much over evaporator? Used to have 2-ton A/C package unit with propane heat (not heat pump) and it cooled house, before new windows and before added attic insulation. Or, second, can Expansion Valve not be releasing enough? Service tech added freon to match pressure chart. If valve not working properly, wouldn't pressures show this? So, back to air flow. Fan is 3 spd, field selectable. Saw spec. sheet calling for 24 by 24 inch filter, but I only have a 20 by 20 filter.
Please help, warranty? 10 degree drop