In this HVAC Gas Furnace Video, I go over how to test if you have a bad hot surface ignitor. HSI Troubleshooting. I go over what the resistance value should be, what type of HSI lasts longer, what voltage you should read, and what step of the sequence of operation the HSI should glow in a heater. How to troubleshoot and fix a broken heater! 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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