Same-DayDiagnosis
ResidentialCommercial
California Lic.#1091355
HVAC May 15, 2025 1 min readUpdated Sep 30, 2026

Replacement of start capacitor and thermostat – Day&Night AC, San Jose

Client's Complaint: The air conditioner stopped turning on. The outdoor unit wasn’t starting, and the system was unresponsive.

Replacement of start capacitor and thermostat – Day&Night AC, San Jose
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Replacement of start capacitor and thermostat – Day&Night AC, San Jose

Client's Complaint: The air conditioner stopped turning on. The outdoor unit wasn’t starting, and the system was unresponsive.

Our technician arrived on-site and performed diagnostics.

  • ✅ It was determined that the start capacitor had failed. The likely cause was frequent short cycling, which puts additional strain on system components and accelerates wear.
  • ✅ The thermostat was working properly, but the client requested to replace it with a new one she had on hand.

Equipment: Day&Night, model NXH636GKA01.

  • ✅ Our technician replaced the faulty capacitor and installed the new thermostat provided by the client.
  • ✅ Diagnosis and repair were completed the same day.
  • ✅ Total cost of the repair was under $400.
  • ✅ We provide a 6-month warranty on the completed work and the replaced part.

The system was successfully restored and is now functioning properly.

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