Your air conditioner relies on a properly functioning evaporator coil to cool down your home. Refrigerant flows through the evaporator coil to pick up heat, and then the heat is released outside. The coil also pulls moisture from the air.
The combined effect of pulling out heat and moisture is what cools down your house. One of the important AC services your AC maintenance technician does is check the evaporator coil to see if it's damaged or dirty. Here are some things the technician may need to do if the evaporator coil is malfunctioning.
1. Clean Off Grime
Dust collects on the coil over time, and if it gets too thick, it interferes with how well the refrigerant works. Since the evaporator coil is wet with condensation, dust turns into grime and sticks to the coil. The air conditioning technician may need to use a foam coil cleaner and brush to get all the grime off so your AC is ready for summer.
If the grime is allowed to stay, your power bills may be higher than they need to be. Your AC needs to run longer due to the refrigerant not being able to cool your home as well, and that drives up your bill. Plus, ice can form on a dirty coil, and that might cause your AC to shut down.
One of the important AC services you get with annual maintenance is cleaning the coil, but if your coil collects dust during the summer, you may need to have the coil cleaned again, especially if ice starts to form.
2. Repair A Hole
Repairing a bad coil is sometimes necessary. If the evaporator coil develops a leak, refrigerant leaks out, and eventually your AC won't be able to keep you cool. A refrigerant could leak due to a connection that worked loose or due to a hole that developed due to corrosion.
The air from your house is pulled in the air handler and blows over the coil. Pollution in the indoor air can cause the copper to corrode and form pits that turn into pinholes. The AC technician might need to cut out the damaged section of the coil and patch in new refrigerant line. The coil is made of copper, so a new section can be patched in by soldering.
3. Replace The Coil
Your evaporator coil may never need to be replaced. However, if it has a lot of pinholes or severe damage, your AC technician may recommend it. However, there are things to think about before you replace the coil, since that is an expensive AC repair.
The refrigerant line is a loop that runs outdoors and includes the condenser coil. It might be best to replace the entire refrigerant line at the same time. If so, it may be time to just get a new air conditioner rather than invest so much money in repairs.
Your AC technician has to consider the age and condition of your air conditioner as well as the cost of repairs and the cost of replacement to decide what AC services are right for your equipment and your budget.
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