Videos

System Burnout We cover the basics of burnout and dive into cleanout procedures. We also look at the Emerson-Copeland Bulletin AE24-1105 for some information inside manufacturer literature.You can read that bulletin at the following link: HERE. Burnout is a type of compressor failure where there is electrical arcing. A short-circuit to ground or from winding […]

When a compressor shorts, the resistance will be low, and the electricity will move from line 1 to line 2 so quickly that it trips the breaker. Before making a hasty diagnosis, it is best practice to confirm a short by ohming out your compressor with your meter. The resistance will read much lower than […]

Compression ratio is the ratio of head pressure to suction pressure in an HVAC/R unit. Generally, compression ratios approach 2.5:1 on high-efficiency, 16+ SEER A/C systems. The highest compression ratio in A/C compressors is typically 11:1. Refrigeration compression ratios tend to be quite a bit higher (up to 26:1). To calculate a system's compression ratio, […]

To make a 10-wrap rig, you simply take one strand of wire and wrap it to make 10 individual strands in a loop. You can put an ammeter clamp anywhere on it and get a more precise amperage measurement than your meter allows by using a little bit of math. When you measure the amps […]

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If you have an iPhone, subscribe to the podcast HERE, and if you have an Android phone, subscribe HERE. Check out our handy calculators HERE.