When I moved into my first place, I couldn't believe how dirty everything was all the time. I found myself dusting and mopping continuously, only to deal with a fresh layer of grime later. After awhile, I realized that the problem was blowing straight out of my air ducts. My ventilation lines were so dirty that it was spreading grime through my house every single time the air clicked on. Fortunately, I called an HVAC contractor who was able to clean my vents to a gleaming shine. I know how big of a difference cleaning up your ventilation system can make, which is why I want to spread the word.
If your home has not been staying as cool as you like it to be, you may wonder if the refrigerant in your AC unit needs to be recharged. If so, look for the following signs that your central air conditioning unit is low on refrigerant.
Intermittent Warm Air Coming from Your Vents
One of the things you may notice when your AC unit does not have enough refrigerant is that your house seems to be cool for a little while but then turns warm. Since there is still come refrigerant left in the system, the times when the air feels cool is when the liquid is flowing through the condenser.
However, when the line is not full of refrigerant, you will have spells when your house feels warm, even when the unit is running. About once an hour, put your hand over one or two of your air vents to feel the temperature. If you notice that the air feels different from one hour to the next, the refrigerant is probably low.
Ice Forming In and On Your AC Unit
Another sign that your air conditioner's refrigerant is low can be found in and around the unit itself. You may find ice forming on the refrigerant line or even on the exterior casing, especially when the outdoor air temperature drops at night.
When the unit's refrigerant is low, there will be times when an overabundance of the liquid will fill the line. Because there is too much refrigerant inside the line and not enough throughout the rest of the system, this section will freeze up.
When it freezes up, the ice blocks the line so that the cold air cannot exit the AC unit. As the frigidly cold air blows back into the air conditioner, condensation turns to more ice. As a result, you will start seeing ice crystals in the exterior slats.
If you continue to run your air conditioning unit, sheets may even start blocking the slats, causing the blockage of more cold air. This then continues the cycle of ice production until you air conditioner completely freezes up.
If your air conditioner is showing any of the above signs, your unit is probably low on refrigerant. Since low levels are usually caused by a leak somewhere in the system, contact an air conditioning repair service so that they can fix the problem and recharge your AC unit.