FAQ
Air Conditioning Questions and Answers
Straightforward answers to the questions Palm Bay homeowners ask most — every answer is visible on the page, no clicking required.
Questions
Cooling problems
- Why is my AC running constantly but not cooling the house?
- The system is moving air but not removing enough heat, and there are four common reasons. Airflow is restricted by a loaded filter, dirty blower wheel, or dirty evaporator coil, which limits how much heat the coil can absorb. Refrigerant charge is low because of a leak, so there is less capacity available. The outdoor condenser coil is dirty or blocked, so heat cannot be rejected effectively. Or the compressor is weak and no longer pumping properly. Each leaves different evidence in pressure readings, temperature split, and amp draws, which is why diagnosis measures rather than guesses.
- Why does my AC cool at night but fall behind in the afternoon?
- This pattern almost always means the system has lost some capacity but not all of it. At night, when outdoor temperatures drop, the reduced load stays within what the weakened system can deliver. By mid-afternoon the load exceeds available capacity and indoor temperature climbs. Common causes are a dirty condenser coil, marginally low refrigerant charge, restricted airflow, or a condenser fan that is not moving full air. It is a useful symptom to report, because a system that fails only under peak load points toward capacity loss rather than a hard component failure.
- Why are some rooms much warmer than others?
- Uneven temperatures usually come from distribution rather than the equipment. Long duct runs to distant rooms lose capacity to leakage and to hot attic air. A duct that has been crushed, kinked, or disconnected at the boot delivers little air. Return air paths matter too — a closed door with no return path starves a room. Solar gain on west-facing glass adds load exactly when it is hottest. Measuring register airflow and temperature room by room, plus static pressure at the air handler, identifies which of these is responsible before anyone suggests more capacity.
- Should my AC run all day in a Florida summer?
- Long run times are normal and actually desirable in a humid climate, because steady operation is what removes moisture from the air. On the hottest Palm Bay afternoons a correctly sized system may run nearly continuously and that is expected. The concerning pattern is running continuously while indoor temperature climbs above the setpoint — that means capacity is insufficient for the load, whether from dirty coils, low charge, restricted airflow, or duct losses. Short, frequent cycles are the opposite problem and usually indicate oversizing or a control issue.
Questions
Ice, water, and noises
- There is ice on my AC — what should I do right now?
- Turn the system to Off at the thermostat and set the fan to On. That stops the cooling cycle while circulating room air across the coil to thaw it, which typically takes two to eight hours depending on how much ice formed. Do not chip at the ice, and do not keep running the system in Cool, which makes the blockage worse and risks liquid refrigerant reaching the compressor. Replace the air filter while it thaws. Then have the underlying cause diagnosed, because ice is always a symptom — either restricted airflow or low refrigerant charge — and it will return until that cause is fixed.
- Why is there water around my indoor unit?
- In a humid climate an air conditioner condenses a large volume of water, and all of it is supposed to leave through the condensate drain. Water on the floor means that path failed: a clogged drain line, a cracked or rusted drain pan, a disconnected drain fitting, or a frozen coil that thawed and overwhelmed the pan. Turn the system off to stop producing more water, then have it addressed promptly. Homes with a working float switch usually get a shutdown instead of a flood, which is inconvenient but far cheaper than replacing ceilings and flooring.
- What does it mean when the outdoor unit hums but does not start?
- That sound usually means the unit is receiving power and attempting to run, but a motor cannot start. The most common cause by far is a failed run capacitor, which provides the phase shift the fan and compressor motors need to begin rotating. A failed contactor, a seized fan motor, or a compressor with internal problems can produce similar behavior. Do not leave the system energized while it hums, because a compressor drawing locked-rotor current heats quickly and can be damaged. Turn it off at the thermostat and have it diagnosed — capacitor replacement is one of the least expensive repairs.
- My breaker keeps tripping when the AC runs. Is that dangerous?
- It is a signal that should not be ignored or worked around. A breaker trips because current exceeded its rating, and common causes include a compressor drawing excessive current, a shorted motor winding, a failing capacitor causing high amp draw, or damaged wiring. Resetting repeatedly forces the system to keep drawing that current, which can escalate a repairable fault into a destroyed compressor or a wiring failure. Reset once. If it trips again, leave it off and have the electrical values measured. Never replace a breaker with a larger one to stop the tripping.
Questions
Costs and decisions
- Why can't I get a repair price before diagnosis?
- Because identical symptoms come from repairs that differ enormously in cost. A system that will not cool could need an inexpensive capacitor or a coil replacement costing thousands, and nothing observable from inside the house distinguishes them. What can be quoted in advance is the diagnostic charge. After measurement, the repair is priced from what was actually found, and you approve it before work begins. Any price quoted before diagnosis is either a guess or a worst-case number, and neither serves you well.
- How do I decide between repairing and replacing?
- Weigh four things together rather than fixating on age. First, repair cost relative to replacement — as it approaches a third to half of new equipment, the comparison becomes serious. Second, refrigerant type, since R-22 systems face expensive refrigerant-related repairs. Third, the condition of everything you are not repairing: coil, blower, cabinet, and ducts. Fourth, repair history, because two or three repairs in consecutive seasons usually predicts more. Ask for both numbers in writing along with the expected remaining life of each option, then decide on the economics.
- Is a maintenance visit actually worth the money?
- Its value comes from measurement more than cleaning. Capacitor readings compared against rated values, compressor and blower amp draws, static pressure, temperature split, superheat, and subcooling all reveal drift long before a breakdown. Catching a weak capacitor in spring costs a fraction of an emergency call in August, and a cleared drain line costs far less than repairing a water-damaged ceiling. Cleaning matters too, since dirty coils quietly raise energy use and shorten equipment life. In Florida's long cooling season, the arithmetic generally favors annual service.
- Does adding refrigerant fix a system that is low?
- It restores cooling temporarily, but refrigerant is not consumed in normal operation — a sealed system only loses it through a leak. Adding refrigerant without finding and repairing the leak means paying for the same loss again next season, and running low on charge stresses the compressor in the meantime. The correct sequence is locating the leak, evaluating whether it is repairable, repairing it, pressure testing, evacuating properly, and then charging to the manufacturer's specification by weight. On older R-22 systems, that process is also where replacement often becomes the better value.
Questions
Maintenance and prevention
- How often should I change my air filter in Palm Bay?
- Every one to three months for standard one-inch filters, and more often if you have pets, run the system continuously, or have ongoing construction dust. Thicker media filters, four or five inches deep, often last six months to a year. The more important point is filter type: a very high MERV rating in a system not designed for it restricts airflow, which reduces capacity, hurts dehumidification, and can freeze the coil. Use the type the equipment was designed for, and check it monthly during peak cooling season since Florida run hours load filters faster than most climates.
- What can I safely do myself around the outdoor unit?
- Keep about two feet of clear space on all sides and several feet above. Trim back shrubs and vines, and keep grass clippings from being blown into the coil. With the system off at the thermostat and the outdoor disconnect, you can rinse the coil gently with plain water from a garden hose — ideally from the inside out where the cabinet allows — which is especially valuable near the lagoon where salt accumulates. Aim sprinklers away from the unit. Avoid pressure washers, which bend fins permanently, and leave the electrical compartment alone.
- Should I close vents in unused rooms to save money?
- Generally no. Duct systems are designed for a specific airflow, and closing registers raises static pressure, reduces total airflow across the evaporator coil, and can push the system toward freezing. It also increases duct leakage by raising pressure in the ducts, so more conditioned air escapes into the attic. The savings people expect rarely materialize, and the added strain on the blower is real. If certain rooms are consistently uncomfortable, balancing the system properly — adjusting dampers and correcting duct problems — accomplishes far more than closing vents.
- How long should an air conditioner last in Florida?
- Expect a shorter service life than published national averages suggest, because Florida systems accumulate far more run hours per year, and coastal areas add salt corrosion. Well-maintained equipment can reach the mid-teens; neglected equipment or units very close to salt water may not. What extends life is unglamorous: clean coils, correct airflow, correct refrigerant charge, clear condensate drainage, and replacing weak electrical components before they strain the compressor. What shortens it is running with restricted airflow, low charge, or a marginal capacitor for months at a time.
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Air Conditioner Repair Palm Bay FL1501 Robert J Conlan Blvd NE, Suite #459
Palm Bay, FL 32905