What Should I Do If My Air Conditioner Is Running But Not Cooling?
If your air conditioner is running but not cooling, try these quick checks before scheduling service.
- Set the thermostat to Cool and a lower temperature.
- Replace a dirty air filter.
- Clear 12–24 inches of airflow around the outdoor unit.
- Verify breakers and the outdoor disconnect are on.
- Look for ice on the refrigerant lines; turn the system off to thaw.
- If it still won’t cool, we offer 24/7 diagnostics and repair in Boise and Nampa.
Updated: 2026-01-02 00:00:00
Need help in Caldwell, ID? Call (208) 738-4822 or book online.
Sources 12
- Heating System Repair Diagnostic service: comprehensive diagnosis and report for $49, with 4 Hour Arrival.ultimateheatingandair.com
- $149 A/C Tune-Up with No-Breakdown Guarantee — if your system breaks down within 6 months we'll diagnose at no cost, give priority scheduling, and credit the maintenance charge toward repair.ultimateheatingandair.com
- $149 A/C Tune-Up & No-Breakdown Guarantee + Same Day Service. 100% satisfaction guaranteed. Discounts available for Lion Shield Members.ultimateheatingandair.com
- Air Duct Replacement as low as $107/mo. Includes free proposal, same day service, and financing options available.ultimateheatingandair.com
- Happy comment by Allisonwww.google.com
- Happy comment by Kari Hwww.google.com
- Happy comment by Craig Hansonwww.google.com
- Happy comment by Angela McInerneywww.google.com
- Maintenance Plans | Ultimate Heating & Airultimateheatingandair.com
- FAQ | Ultimate Heating & Airultimateheatingandair.com
- Nampa AC Repair | Ultimate Heating & Airultimateheatingandair.com
- Star AC Repair | Ultimate Heating & Airultimateheatingandair.com