Derek ColeGM, Simmons One Hour Heating & Air · AI HVAC Answers

How to Check Capacitor Ratings for HVAC Systems

13 Feb 2025 · 0 min

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This content was created by Derek Cole. This content was uploaded by Derek Cole. This is a YouTube instructional excerpt titled "How to Check Capacitor Ratings for HVAC Systems" (created 2025-02-13). A single speaker (labeled SPEAKER A) provides a technical demonstration on reading capacitor markings (e.g., terminals labeled 4 and 5), explaining which terminals serve the compressor and fan, noting the rating unit (mfd/microfarads), and describing using meters to compare measured values to rated values to determine capacitor failure.

We check the capacitor to find the ratings that are on it. As you can see, on this particular one, it is a 4 to 5 plus 5. That means the 4 to 5 operates the compressor side of it and the 5 operates the fan side of it. Now, it's rated in mfd, so we have meters that we can check to see the ratings on it in comparing to what it's supposed to be, and we determine if the. If the capacitor is failed.