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AC Short Cycling

An AC that turns on and off every few minutes may have a dirty filter, oversized unit, frozen coil, or failing capacitor. Replace the filter first; professional diagnosis typically runs $150–$550.

Reviewed July 2026

What does ac short cycling mean?

Short cycling wastes energy and wears out the compressor. Restricted airflow from a dirty filter is the easiest fix. Low refrigerant, a failing capacitor, or an oversized system that cools too quickly can also cause rapid on-off cycles.

What usually causes ac short cycling?

Clogged air filtermost common

Typical repair: $20–$75

Frozen evaporator coilcommon

Typical repair: $2,500–$5,500

Failing capacitor or contactorpossible

Typical repair: $150–$400

Find your exact error code

Select your furnace brand to jump to the code page for this symptom.

Carrier13Limit or rollout circuit lockoutBryant13Limit or rollout circuit lockoutTempstar4 FlashLimit or rollout circuit openRheem13Flame was lost during operationPayne13Limit or rollout circuit lockout

What should I check first when ac short cycling?

  1. Replace the air filter.
  2. Check for ice on the refrigerant line.
  3. Note how long each cycle runs — under two minutes is short cycling.
  4. Call a pro if cycling continues after a filter change.

What a repair costs

A furnace filter replacement typically costs between $20 and $75 nationally.

Typical repair cost
$20 – $75furnace filter replacement
Where the money goes
Part $10–$50Labor $0–$65Typical labor time: 0.25 hrs

This is general information, not professional advice. Gas, electrical, and combustion repairs can be dangerous — when in doubt, call a licensed technician.