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Master of HVAC: The Ultimate Heating & Cooling Maintenance Quiz
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What does a yellow or flickering pilot light on a gas furnace usually indicate?
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Hint
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⚖️
50-50
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Audience
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A
The furnace is operating perfectly
B
High carbon monoxide levels are being generated
C
Incomplete combustion, which requires immediate service
D
The thermostat is set too low
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