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Master of HVAC: The Ultimate Heating & Cooling Maintenance Quiz
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What is the purpose of the 'fan run' or 'blower' delay on a furnace?
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50-50
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A
To allow the heat exchanger to warm up before blowing air into the living space
B
To prevent the thermostat from shorting out
C
To clean the air filter before heating starts
D
To reduce the starting current of the compressor
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