What makes an AC eat electricity
- Dirty filter or coil. The system works harder and longer to move air — the most common cause of a creeping bill.
- Low refrigerant. The AC runs constantly but never quite cools, burning power the whole time.
- Leaky or uninsulated ducts. Cooled air escaping into the attic means you pay to cool your attic. Common in older Florida homes.
- An aging or failing system. Old units and weak capacitors make the compressor strain and draw more power.
- Thermostat habits. Setting it very low doesn't cool faster — it just runs longer. 78°F when home is the efficiency sweet spot.
- Dirty outdoor condenser. Caked in grass and dust, it can't dump heat, so it runs longer.
Fixes that actually lower the bill
- Change the filter monthly in summer — cheapest win there is.
- Set 78°F when home, higher when away (a smart thermostat automates this).
- Rinse the outdoor unit and keep it clear.
- Get a tune-up to catch low refrigerant and a weak capacitor before they spike your bill.
- Seal obvious duct leaks and add attic insulation if yours is thin.
Sudden spike, same habits? That usually means a mechanical problem (low refrigerant, failing part) rather than the weather — worth a diagnosis, because it'll keep costing you every month until it's fixed.
Handy parts to keep around
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Smart thermostat
Automates the 78°-when-home / higher-when-away savings.
View on Amazon →AC air filters
A clean filter is the cheapest bill-saver there is.
View on Amazon →Duct sealing tape
Seal leaks so you stop paying to cool the attic.
View on Amazon →
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