Air Conditioning Repairs

If your basic symptom is that the A/C temperature at the supply registers is cool enough but the volume of air flow is too weak, follow these steps:

1. Install a new, clean air filter
2. Check that the air supply registers are open
3. Check that ductwork has not become disconnected, crimped or crushed
4. Look over the duct system to diagnose the poor air flow out of an HVAC duct system

Weak air conditioner air flow—Weak air flow coming out of the vents is most likely caused by a clogged filter or crushed or disconnected ductwork, or a blower fan problem.

We provide a very basic air conditioning or heat pump diagnostic checklist below, followed by more detailed descriptions of common problem cooling system topics.

How to Troubleshoot Your Unit

1. Check the room thermostat temperature setting: Set the thermostat to at least five degrees below room temperature.
2. Check that the room thermostat is set to “Cool” not “Off” or “Heat.” If the thermostat is not set to “Cool” it is simply turning off your A/C.
3. Check that electricity is on for the equipment. Check all switches and controls, service switches, including outside by the compressor, inside at the air handler, and fuses or circuit breakers in the electrical panel.

Quick Diagnostic Air Conditioning / Heat Pump System

Begin troubleshooting with these five steps. If the air conditioning system is still not working, or if the A/C system is running but cool air is not coming out of the supply registers, please call us at (904) 245-1818.

1. Check the Outside Air Conditioning /Heat Pump Compressor-Condenser unit.
   If the outdoor compressor fan unit is not running, make sure the and the air conditioner indoor power switch, fuse, or circuit breaker are in the “ON” position. Check the outside compressor condensing coil for damage or blockage, as a blocked condensing coil can cause the compressor to overheat, stop running, or under perform.
2. Check the Air Conditioning/Heat Pump Indoor Air Handler.
   Locate the air handler or blower unit, typically found indoors inside the basement, crawl area, or attic. If the indoor blower unit is not running, be sure that the electrical power switch at your furnace or air conditioner air-handler is in the “ON” position.
3. Check the Air Conditioning/Heat Pump Air Filter(s)
   If your air conditioning equipment is running, but little or no cool air is coming out of the supply registers, check that your air filter(s) have not become blocked with dirt and debris.
4. Check the Air Conditioning/Heat Pump System.
   Cool air should come through the ductwork and out of the air supply registers in ceilings, walls, or floors. Be sure that the register is in the “open” position (you will be able to see through it into the ductwork) and check to make sure you haven’t blocked the supply registers with a carpet or furniture. Look for a duct damper or register that has been closed or a flex-duct section that has become disconnected, bent, crimped or squashed in the crawl space. Finally, make sure your air filter has not come loose and blown into the ductwork, clogging it.
5. Check the Air Conditioning /Heat Pump indoor air handler blower fan assembly.
   Look for a fan motor that won’t start or a tripped motor reset button that needs to be reset. Next, check for a blower fan that is loose on the motor drive shaft or for a broken or lost blower fan drive belt on pulley-driven blower systems.

How to Diagnose Air Conditioner Output

Air flow that is too slow for any reason (such as a dirty filter or dirty blower fan assembly blades) can cause air temperatures that are abnormally low to flow from the air conditioner. Air flow that is too fast for any reason (improper fan motor, speed, fan belt or pulley size, duct design, duct registers removed, etc.) can produce air that is not cool enough and can prevent proper air dehumidification (oversized A/C system).

Short Cycling Air Conditioner Diagnosis & Repair

Home air conditioner compressor short cycling on and off too rapidly are cause by these five reasons:

1. A refrigerant leak in the system — You may be able to repair the short cycling problem temporarily by recharging the air conditioning system, but the proper repair is to find and fix the leak. Otherwise you will have to keep repeating the costly service call to just add refrigerant.
2. A/C Coil Icing — When the evaporator coil (cooling coil) can over due to improper refrigerant charge or dirt or a reduced air flow due to a dirty filter. Look in the air handler to see if the coil is blocked by ice or dirt.
3. Oversized air conditioner — If the short cycling has always been a problem since the day the system was installed, there is a good chance that the unit is too big (too many BTUS) for the space being cooled. Sometimes we can mitigate this problem by running the blower fan at a lower speed, opening interior doors to increase the size of the space being cooled, or even by moving the thermostat.
4. A/C control problem — It’s less likely, but a damaged control board or switch could also be causing rapid equipment on/off cycling.
5. Compressor damage or compressor start-troubles — This problem is often caused by manually turning the air conditioner thermostat up and down or on and off too frequently. If your A/C compressor is showing this symptom but works well if you leave it shut off for 30 minutes or longer, that may be the trouble.

Yes, we have technicians on call 24/7 to assist with all of your HVAC emergencies. No matter the day or time, give us a call at (904) 245-1818!

Most Repairs will be handled within a few hours. With complex issues, repairs could take a full day.