Hi, I have an old R22 AC that runs fine when I top off the Freon. But has a very small leak on the evaporator coil u-tubes at the coil end. The fill up lasts about 3 months under load. I’m in the North East and won’t be using it until May 2027 at the earliest. At rest the system currently has about 90 psi of internal pressure. Compressor doesn’t kick in due to low pressure. Last year I tried a leak sealer and Freon fill, lasted a little longer, but maybe more u-tubes leaking. Question 1. a new coil is available, should I replace it or pull out the current one and braze the u-tube leaks? I would be doing the work. Thanks