So, if your evaporator coil has sprung a leak and your unit uses R-22, it could get very expensive to replace the coil and then recharge your unit with more R-22. As of today, no more R-22 refrigerant is being produced, which makes it very expensive. Because of this, most countries have slowly phased out its use. You see, R-22 is an older refrigerant that’s harmful to the environment. If your unit uses R-22, your best option is to replace the entire unit for one that uses R-410A refrigerant. Similarly, if you have a low-SEER outdoor coil that’s paired with a highly efficient indoor coil, the outdoor coil will drag down the performance of your indoor coil-which means you’ve wasted the money you just spent on your new evaporator coil. Pairing an efficient 14-SEER coil with an older, less efficient coil is like installing a V10 engine in a 10-year-old minivan-you’re just not going to get the performance you’d expect from the engine, right? So is it really all that bad if your AC coils are mismatched in SEER ratings? Yes. If this is the case, you’ll need to completely replace your unit-otherwise you’d end up with an indoor and outdoor unit with mismatching SEER ratings. For example, if you have a 12-SEER unit that needs a replacement evaporator coil, it’s very possible that replacement 12-SEER coils for that model are obsolete and not made anymore. But if you have an older unit, it could have a SEER rating that’s a lot lower than that. The higher the SEER, the more efficient the unit (and the coil). The evaporator coil you need to replace is obsoleteĮvery AC has a “SEER” rating (ranging from 13 to 21) that determines how efficient the unit is. Working alongside an old coil that isn’t pulling its weight would put stress on the new coil, causing it to die earlier than it should.Ģ. Plus, if you were to replace the coil, it’d have a near-death partner to work with.
That said, if your AC is nearing 8 years old, replacing just the evaporator coil would be like putting a brand new engine into a dying car-it’s just not worth the money. Air conditioners last anywhere from 10 to 12 years.
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