Airflow from Air conditioner is low
how do i fix it.
Airflow from your air conditioner can be low for a number of reasons, if would greatly help if you had said whether it was a window unit or a furnace/ac type of split system. That being said, here are a few places worth looking.
1) AIR FILTER - if you have a furnace, this will be inline with any duct work. If you have a window unit, the filter will usually pop out from the front(usually these are a nylon mesh and can be washed in the kitchen sink). If you have the former furnace based air filter these are replaceable in most cases and can be bought at any hardware store and sometimes walmart.
2) EVAPORATOR FAN MOTOR - Your evaporator fan motor may have something caught around the shaft, or the blades may have broken. A lot of window units use plastic fan blades, and they do on occasion break. In the case of a home furnace/ac you have a blower wheel, or "squirrel cage", these blades are usually metal and can rust out over long periods of time without proper care. If you have a belt drive motor, the belts may need to be tightened, or changed. A belt drive motor would be very rare in a residential application.
3) EVAPORATOR COIL ICING UP (FREEZING) - The evaporator coil is the portion of the system which absorbs heat (it is later rejected outside or in a more desirable area by the condenser coil). This coil gets cold, usually about 40 degrees F to provide you with 55 degree discharge air. At times, and for a number of different reasons, it is possible for a coil to "freeze", or "ice up". This can be caused by dirty air filters, or bad fan motors/blades, not to mention low refrigerant charge and a host of other problems. If this is your issue, deice the coil, and restore power to the unit. Especially if you have a basic unit with no frills, if left on long enough in a cool enough room with high humidity, a coil can accumulate sufficient ice to lower air flow. Air conditioners of the residential type have no defrost cycle. They instead utilize "off cycle" defrost, meaning that the coil will defrost whenever the unit is not calling for cooling. So it is easy to see if left on for too long you can have problems from this.
1 and 2 are easy to check, 3 may not be so easy. The evaporator is an A-coil and named so for its shape, it will be located the furnace, and you will have to remove a few panels in order to see it in most cases. In a window unit, remove the air filter to gain visual access to the evaporator coil.
I hope this helps, I wish I knew what type of system you were using.
Jul 12, 2011 |
Heating & Cooling