Is your air conditioner constantly turning on and off? This “short cycling” is a common problem in oversized AC systems.
While it might seem like your home is cooling faster, the truth is that an oversized AC can actually make your space less comfortable and put extra strain on your system.
Understanding why it happens and what you can do about it is key to keeping your AC running efficiently.
Troubleshooting Before Replacement
Before assuming your AC is oversized, check for simpler, fixable issues that can also cause short cycling.
Change the Air Filter
A dirty or clogged air filter restricts airflow, causing the system to overheat and shut off prematurely. Replacing a filter is an easy and inexpensive first step.
Check the Thermostat
A malfunctioning or poorly placed thermostat can give false readings. Ensure it’s not in direct sunlight, near a heat source, or too close to a vent. Upgrading to a smart or programmable thermostat can help manage temperature more accurately.
Inspect for Frozen Evaporator Coils
Low airflow from a dirty filter or low refrigerant can cause indoor coils to freeze. If you see ice, turn off the AC and run the fan until it thaws completely. Clean the filter and check for blockages.
Clear the Outdoor Condenser Unit
Leaves, dirt, and debris around the condenser can make your AC work harder and cycle more frequently. Clean the coils and fins gently with a hose.
Adjustments for an Oversized System
If your system is clean and the thermostat works properly, professional adjustments can help.
- Lower Blower Fan Speed – Slows the cooling process, allowing longer run times.
- Install a Whole-House Dehumidifier – Helps control humidity when the AC can’t fully dehumidify.
- Add Warm Air to the System – A technician can route a small amount of warm air back into the return duct to extend cycles.
- Increase Thermostat Minimum Run Time – Forces longer, more efficient cycles if the thermostat allows adjustment.
- Expand Ductwork – Disperses excess cooling to less-used areas and balances the system.
Long-Term Solution – Replacement
While these adjustments help temporarily, they do not solve the underlying problem. Oversized AC systems lead to higher energy bills, poor humidity control, and faster wear on components.
The most effective long-term solution is to consult a qualified HVAC professional to perform a Manual J load calculation. This ensures your home gets a properly sized AC, improving comfort and saving on energy costs.
If your AC is short-cycling or struggling to manage humidity, contact Adeedo Drains, Plumbing, Heating, & Air for expert inspection and professional solutions to keep your home cool and comfortable.
