Honestly no, but this depends on the age of the system. If you are considering replacing your unit more than likely it is an older generation with a lower SEER rating than those built today. Even with older air conditioning systems you do not have to replace the indoor evaporator coil. But, you would be making a mistake and wasting your money if you choose to keep the old indoor evaporator coil. The two components, the outdoor air conditioning condensing unit and the indoor evaporator coil should be a matched set as far as SEER ratings are concerned in order to obtain the rated efficiency. When running a 13 SEER air conditioning condenser unit with a 10 SEER or lower indoor coil you will more than likely gain very little in efficiency above the rating of the indoor coil. It is also recommended that if you do use your old indoor coil that you have a thermostatic expansion valve (TXV) installed on the indoor coil to properly regulate the refrigerant flow. The other issue today is the change in refrigerants from R22 to R410A, this creates another issue in that the old oil used with R22 is not compatible with the new R410A refrigerant and both the line set (copper tubes) and the indoor coil must be internally cleaned or replaced prior to installing the new refrigerant in order to prevent damage to the new air conditioning condensing unit.

See more frequently asked questions on our website here: http://www.asi-heating-airconditioning.com/Air_Conditioning_FAQ.html

Ameri-Serv, Inc.

Heating and Cooling

Facilities Services

13601 W. Mc Millan Rd. S/102-120

Boise, Idaho 83713

Ada County (208) 342 4328

Canyon County (208) 467-2665

http://www.asi-heating-airconditioning.com/ 

http://www.asihvacr.com

Serving the Treasure Valley with Honest and Dependable Services at Consistently Affordable Prices for all your heating and cooling needs. 100% Satisfaction always Guaranteed.   Residential and Commercial Sales Installation, Repairs and Services on all brands and system types.   Gas, Oil, Electric Furnaces - Heat Pumps – Air Conditioning – Dual Fuel Green Hybrid Systems – Geo Thermal Systems – Indoor Air Quality – Building Automation