When summertime hits, the last thing you want to be stuck with is a malfunctioning air conditioner. So when you go to turn on the first time the weather warms up to discover it’s blowing out lukewarm air, your initial reaction may be to panic and start shopping for a new air conditioner. Before you jump to any conclusions though, be sure to read below to discover some common reasons that your AC might not be cooling. Sometimes it’s as simple as a quick repair!
Why Is My Air Conditioner Running but Not Cooling?
Your air conditioner may run without cooling if something is blocking airflow, disrupting the cooling cycle, or preventing the system from removing heat properly. Common causes include:
- Thermostat settings that are incorrect or set to the wrong mode
- Damaged, leaking, bent, or poorly installed ductwork
- Low refrigerant caused by a leak
- Dirty, damaged, or nonworking condenser coils
- A blown fuse or tripped circuit breaker affecting the outdoor unit
If these checks do not restore cool air, schedule AC repair so a technician can diagnose the issue and prevent further system damage.
Thermostat Problems That Affect Cooling
It’s no secret that when you live in a home with multiple occupants, people may have different cooling preferences, and in the summer heat it becomes even more urgent when the ac unit is not cooling properly. When this is the case, quite often other people will mess with the thermostat. Be sure to check that nobody has changed the temperature setting on your thermostat, and also that the thermostat is set to “cool” rather than “auto.” If it’s set to auto, then the fan may run but you won’t get any cooling effect from the cooling system. A smart thermostat can help maintain a comfortable temperature more efficiently. If your settings are correct but problems continue, don’t wait to schedule annual inspections, tune-ups, and routine maintenance during an AC service visit with highly trained HVAC technicians. A maintenance plan helps catch issues early, keeps your system running at peak efficiency, and can help you avoid more problems. In many cases, a quick repair may restore your home’s comfort.
Leaky or Blocked Ductwork
Whether your ductwork has a small hole or tear in it, is bent, or even wasn’t installed correctly to begin with, it can cause weak airflow from vents and cannot deliver the conditioned air that it is meant to. Additionally, breached ductwork makes your air conditioner work harder to achieve proper cooling, and damaged ductwork can force system components to do a bigger job and create more strain, so catching these small issues early can help prevent ac repair needs from turning into big problems. If airflow remains weak after duct issues are addressed, an HVAC blower-related component may need professional inspection, and if your settings are correct but problems continue, do not wait for symptoms to get worse, since weak airflow from vents may indicate a blower motor or fan motor issue. An inspection and possible duct sealing may likely be necessary to seal leaks and improve insulation, and professional air conditioning services can also inspect duct-related components and improve whole-house airflow. Regular tune-ups help keep the AC unit and overall cooling system running at peak efficiency, helping reduce strain on HVAC systems, and delaying service can lead to more problems.
Low Refrigerant or Refrigerant Leaks
Upon installation, your air conditioning system is supplied with enough refrigerant to last its entire lifespan. Dirty filters and clogged filters can also strain ac systems and raise energy bills. Change air filters every 1 to 3 months to avoid system strain, and in dirtier conditions, changing dirty filters monthly can help prevent big problems and larger AC repair needs. However, occasionally damage or corrosion occurs that causes refrigerant leaks. Leaks reduce the system’s ability to transfer heat. If this happens, your AC may blow warm air instead of cooling properly. Frozen coils can also be a warning sign. A refrigerant leak should be taken care of right away to prevent further damage to your AC system. In some cases, major damage means you may need to replace components, and newer AC systems use more efficient refrigerants than older models, making replacement the more cost effective option.
Dirty or Blocked Condenser Coils
A blown fuse or even a tripped circuit breaker can prevent your condenser coil from working, and dirty or blocked coils cannot transfer heat efficiently, which reduces cooling performance, even though the fan will continue to run, and the outdoor unit should also have at least 2 to 3 feet of space around it, with two feet of clearance for proper airflow. This will make it appear as though your AC is operating, but not cooling, a failing compressor or other compressor issue can also leave the system running without cool air flowing. Loud noises can be another sign of a failing compressor.
Water leaks or pooling around the unit can indicate a clogged drain line, and inspecting the drain pan along with the drain line helps prevent water damage and mold growth.
Strange noises are one of the warning signs that professional service is needed. If you suspect you have a problem with this or any of the above mentioned issues, call us for air conditioning repair or emergency AC repair in Des Moines, available 24/7 in Des Moines, IA and across the Des Moines area, including West Des Moines. Our technicians are well equipped, highly trained in heating and cooling services, and can diagnose the job and provide options to fix or replace major components on all major AC brands and models.
Frequently Asked Questions
Question: Why is my air conditioner blowing lukewarm air?
Answer: Lukewarm air can come from several AC problems, including incorrect thermostat settings, leaking ductwork, low refrigerant, or an issue with the condenser coil. Before assuming the system needs replacement, check the thermostat first. Some cooling problems can be solved with a repair rather than a new unit.
Question: What thermostat settings should I check if my AC is not cooling?
Answer: Make sure the thermostat temperature has not been changed and that the system is set to cool. If the setting is wrong, the fan may run without producing the cooling you expect. A simple thermostat adjustment is one of the first things to check before calling for service.
Question: Can ductwork problems stop my home from cooling?
Answer: Yes, damaged or poorly installed ductwork can prevent conditioned air from reaching the rooms in your home. Holes, tears, bends, or disconnected sections can also make the air conditioner work harder than necessary. In many cases, a duct inspection and sealing may be needed.
Question: Why does low refrigerant keep an AC from cooling?
Answer: Refrigerant is what allows your air conditioner to move heat and produce cool air. If corrosion or damage causes a refrigerant leak, the system may lose cooling power and could suffer additional damage. Refrigerant leaks should be handled quickly by a trained HVAC technician.
Question: Can my AC fan run even if the condenser is not working?
Answer: Yes, the fan may continue running even when a blown fuse or tripped circuit breaker prevents the condenser coil from operating properly. This can make it seem like the AC is working, even though it is not cooling the air. A technician can inspect the system and make the proper repair.
For air conditioning repair in Hudson, IA, contact Dalton Plumbing, Heating & Cooling, Inc. today!