What could cause a false high reading for the supply-air temperature?
A) If the temperature is taken with the blower on at the same time the heating elements are on.
B) If the temperature is taken after the unit has been running for too long.
C) If the probe is inserted in the supply plenum in a direct line of sight with the heating elements.
D) If the temperature is taken with a probe inserted upside down.
C
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