I have an issue with my Rheem classic XI, it started blowing hot air and kept freezing up, I had it recharged and within 3 weeks it was blowing hot again, I had a technician come out and he said that my accumulator is leaking. There is a lot of rust on the top of the accumulator where the pipes run into the top and I saw the leak sensor going crazy when he passed it over the area. The rest of my system in great shape. Here is my problem. I have a friend that is certified in HVAC, but he wants me to get the replacement parts. I can only find one size accumulator for this AC, part # 83-22459-07 I found it on a parts supply store online for $129 and at sears for $79.00. Is it one size fits all for accumulators? Thanks!