How Capacitors Work, Types, Values & Safe Diagnosis on AC Control Boards HVAC Electronics Class #4

Описание: In Class 4 of our HVAC and Refrigeration Electronics Course, you will learn everything about electrical capacitors (capacitors or capaciteurs) used in air conditioning and refrigeration electronic control boards.

This in-depth technical training explains how capacitors work on HVAC PCBs, why they are critical for voltage stabilization, signal filtering, noise suppression, and energy storage, and how faulty capacitors can cause erratic operation, error codes, board failures, and compressor damage.

📌 What you will learn in this video:

What an electrical capacitor is and its role in HVAC electronics

How capacitors work on AC and refrigeration control boards

Signal filtering vs energy storage in electronic circuits

Typical capacitor values used in HVAC PCBs

Filtering capacitors (1–100 µF)

Coupling and decoupling capacitors (pF to µF range)

Types of capacitors used in air conditioners and refrigerators

Ceramic capacitors (high-frequency filtering)

Electrolytic capacitors (low-frequency filtering and energy storage)

Tantalum capacitors (low ESR, high stability applications)

🔧 Capacitor diagnosis and safety procedures:

Visual inspection: swelling, leaks, burns, corrosion

Why incorrect diagnosis can damage the control board or cause injuries

How to safely discharge capacitors on HVAC electronic boards

Recommended discharge resistors (1 kΩ to 10 kΩ) and why they matter

Choosing the correct resistor power rating (5 W recommended)

Step-by-step safe capacitor discharge procedure

How to verify zero voltage before handling components

📏 Measuring capacitors correctly:

How to test capacitors using a multimeter

Understanding resistance behavior during capacitor charging

Identifying shorted, open, or leaking capacitors

When to test in-circuit vs out-of-circuit

How to measure capacitance using a capacitance meter

Comparing measured values with nominal ratings and tolerances

ESR considerations and aging effects in HVAC capacitors

This video is ideal for:
✔ HVAC technicians
✔ Refrigeration mechanics
✔ Electronics repair professionals
✔ HVAC students and instructors
✔ Anyone diagnosing air conditioner control boards, inverter boards, or refrigeration PCBs