With the introduction of Model 3A, checking coil soundness has become significantly easier and more efficient. Now, the indication lights conveniently located on the front of the tool panel will clearly inform you if the coil has any open and/or shorted windings, allowing for quick diagnostics. The top button on the side of the tool activates the open winding indication mode, while the bottom 3-position switch is designed to turn the tool on in battery mode, turn it off, or switch it to power adaptor mode. In total, there are five LEDs incorporated into the design; the red LED serves as an indicator that you are currently in open winding or short indication mode, while the remaining four LEDs indicate a motor's state of open winding and/or short condition. The fuses play a crucial role in signaling a motor short condition, which will ultimately prevent one or more of the LEDs from lighting up, helping you to quickly identify if the failure is indeed a short. This entire diagnostic process is facilitated through the Motor Open Winding/Short Indication Conductor Cable for added efficiency. For comprehensive functionality checks, you should employ the Function Test Conductor Cable, which allows for thorough assessments. The combination of these features provides a powerful method of verifying that your diagnostics are sound; even if the indicator test passes and the function test does not, you will still be aware of a faulty valve. This Electronic Expansion Valve Tester Tool, widely recognized as the EEVT Tool, is manufactured in the United States, utilizing parts sourced from various regions to ensure quality. It is an essential tool for professionals within the HVAC & Refrigeration industry, as it supports a variety of EEV testing purposes. The new and improved EEVT Tool now includes a 4-conductor ABS plastic insulated cable and an auxiliary power connection. The product additionally comes equipped with a FCC and CE approved 18VDC wall adaptor, guaranteeing safety and reliability. Like its predecessor, this tool efficiently tests, unsticks, and diagnoses electronic expansion valves. It also now features a 6-pin Dupont connector adaptor for troubleshooting most domestic refrigeration electronic expansion valves, enhancing its versatility. Whether you are an experienced professional mechanic or a dedicated DIY enthusiast, this tool is undoubtedly an invaluable addition to your toolkit. We encourage you to order your electronic expansion valve tester tool today and begin experiencing the multitude of benefits that it has to offer.