![]() R-407C may also be used as a replacement, but this requires a full replacement of the system oil with POE oil. A small amount of POE oil must be added to the system. Refrigerant is a dangerous chemical, and should only be handled by an HVAC professional. Residential: For single compressor/single speed residential split and package systems, R-438A may be used as a replacement for R-22. This may be a refrigerant leak, which is a sign that some part of the AC cooling cycle, possibly the AC compressor, is not running smoothly. Leaks around your unit: If you go outside and see a leak around your air conditioner, do not go near it.If you hear banging, hissing, clattering or screeching noises, it’s likely that your compressor, or another component of your AC unit, is not working properly and you need to call an HVAC professional. Strange noises coming from your AC: When your unit is turned on and functioning properly, you should hear the fan and compressor running smoothly, with a slight hum.If you feel lukewarm or cold air coming out outside, your compressor might not be working. You should be able to feel a stream of hot air coming out of the air conditioner. Without actually touching the air conditioner, align your hand with the fan. ![]() Without getting too close to your unit, stand near the outdoor fan. To detect whether your unit is releasing hot air, go outside while your air conditioner is turned on. When it’s functioning properly, it should be releasing hot air outside.
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