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Oil Burner License Exam Questions and Answers, Latest Updated 2024/2025 (Verified Answers)
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Oil Burner License Exam Questions and Answers, Latest Updated 2024/2025 (Verified Answers) What is the first thing a tech should do when arriving at a no combustion call? - AnswerAsk how many times the customer reset the unit. What is the best long term solution for preventing a clogged nozzle? - ...
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