I currently have a Trane air handler, model # TWE 048C140F3. Its a 4 ton unit and was installed in 1994. The coil is now leaking. I received an estimate of $962.00 to replace just the coil. My question is, can I replace the entire air handler with model # 2TGBE3F48 without adversely affecting the whole system? There's a company in town that will install the entire new air handler unit for $1,150.00!! The new model has a SEER 13 rating, while the older system was a 10 SEER. I don't want to replace the outside compressor, which is working fine. The outside unit is a Trane XE 1000, Model # TWR048C100A1, and I believe it also is 4 ton. I live in Orlando, FL and it gets very humid here in the summers! THANKS to any and all who can give me some advice!

Can some one tell me what Recovery on my thermostat means? I have an Arcoaire 12 Seer Heat Pump and a Honeywell T8611g 2002 Thermostat. It is about 24 degrees outside right now. I previously had ice build up on the outside unit on the bottom, but have since had it filled with freon, and it has not had ice build up since.