In this HVAC Heat Pump Defrost Video, I go over the pivotal role that the DFT Defrost Limit Sensor has in making sure that defrost cycle happens so that the Heat Pump doesn't freeze solid in wintertime. I go over how to read the model number, what the letters and numbers mean in the model number, what the resistance values should be at certain temperatures, why the limit sensor doesn't open until it gets to the appropriate temp, and why it does not close until it gets down to the right temp. These are shown and discussed for a deeper understanding of how a heat pump and defrost board works in order to troubleshoot problems when they arise. Supervision is needed by a licensed HVAC Tech before doing this as Experience and Apprenticeship garners Wisdom and Safety.

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️ Disclaimer:
Information in this video is intended for educational purposes only. Any work related to the topics in this video should be performed by licensed technicians or by apprentices under the supervision of licensed technicians. AC Service Tech LLC is not responsible for any possible damages or injuries caused by the use or misuse of any information provided. ▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬
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