KONGRA LLC · HVAC diagnostics
Capacitor & Contactor Diagnostics
Illustrative checklist for run/start capacitor and contactor diagnostics on residential and light-commercial HVAC condensing units. Electrical work is performed only within KONGRA's legal license scope.
What we check
Capacitor / contactor checklist
Run capacitor microfarad test
Start capacitor / hard-start
Contactor coil voltage
Contactor contacts pitted / welded
Compressor amp draw
Fan motor amp draw
Low-voltage transformer
24V control circuit
Pillar & related pages
Reviews
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FAQ
Frequently asked questions
Why are capacitors and contactors a common issue?+
They see high current and thermal cycles every start; capacitance drift and pitted contacts are among the most frequent failure points on outdoor condensing units.
Do you handle electrical work?+
Electrical and HVAC diagnostics are performed only within KONGRA's legal license scope. Some work may require a properly licensed specialist.