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.
Secure scheduling via Square. KONGRA does not request passwords, login credentials, bank login information, private keys, or sensitive account-access information.
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
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Pillar & related pages
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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.
Is the diagnostic paid?+
Yes. Diagnostic is a paid on-site visit with proper instruments and service data.