What causes my air conditioner to keep running without lowering indoor moisture levels?

Your air conditioner runs but doesn't remove humidity when something prevents moisture condensation on the evaporator coils. We find this happens most often with oversized units that short-cycle, clogged filters blocking airflow, low refrigerant reducing cooling power, leaking ductwork pulling in outdoor air, or thermostat settings that don't allow proper dehumidification cycles.

What are the best ways to reduce indoor humidity using your air conditioning system?

We recommend starting with simple fixes: replace clogged air filters monthly, switch your thermostat fan from "ON" to "AUTO" mode, and clear any blocked vents. If humidity persists, you'll need professional help to check refrigerant levels, seal duct leaks, or address system sizing issues that prevent proper moisture removal from your home.

How do humidity issues impact energy bills and home maintenance costs?

We see humidity problems waste money three ways: your AC works overtime trying to cool air contaminated with humid outdoor air, driving up utility costs; excess moisture damages your home over time; and inefficient cooling means you're paying for comfort you're not getting. Duct leaks especially make proper dehumidification nearly impossible while increasing energy consumption.

Air Conditioning Contractor Archives | Page 2 of 2 | Solutions Heating & Cooling

Why Is My House So Humid Even With the AC Running?

by Bridget Lee | Mar 4, 2026 | Air Conditioning Contractor

Your AC is running constantly, but your Danville home still feels sticky and uncomfortable. You’ve noticed condensation on windows, that musty smell in certain rooms, and your energy bills keep climbing. When your air conditioner can’t control humidity...

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Why Is My House So Humid Even With the AC Running?

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