Here is the update of my dealer's resolution.
The 2007 model was from a local supplier. By admitting the mistake, the supplier will pick up the expense of replacing a newer model so the dealer is willing to come over do the replacement.
I said partial replacement because the gas furnace is already installed on top of the coil, so the dealer will keep the metal case of the old coil in place and put in the inner parts (spine-fin coil ?) of a 2011 model , by doing this way will make the job a little bit easy. I was told the copper refrigant line will be open again, clean, vacume and solder back and reconnect all pipes.
When I ask the comfort specialist 2 days ago to have them replace a newer model, he said he has concern about opening up the refrigerant line and re-solderling it. But now his answer is the technician will take care of that.
So here is my question to you guys : Is that the normal procedure just replace the inner parts when a coil is need to be replaced? Will it cause any harm or side effect to the heat pump or gas furnace?
(I assume the warranty should not be affected, right?)