Homeowner Guide
When the indoor blower runs but the outdoor unit stays silent, hums, clicks, or tries to start and stops, a short symptom note can help Scott decide whether the first visit should be a diagnostic.
Confirm the thermostat is set to cool and set below the room temperature. Notice whether the indoor blower is moving air, whether the outdoor unit is completely silent, humming, clicking, or starting and stopping, and whether any breaker or disconnect was recently touched.
If the outdoor unit hums, buzzes, trips a breaker, smells hot, or keeps trying and stopping, stop cycling it over and over. That pattern needs a diagnostic, not repeated resets.
Outdoor-unit startup problems can involve thermostat calls, drain safeties, contactors, capacitors, wiring, fan motors, compressors, or power issues. The $95 Springfield Diagnostic gives the repair conversation a real starting point.
Read the diagnostic page