QuestionAugust 11, 2025

When is the B terminal of the heat pump control board energized? in heating mode only In cooling mode only In cooling mode and defrost mode in heating mode and defrost mode

When is the B terminal of the heat pump control board energized? in heating mode only In cooling mode only In cooling mode and defrost mode in heating mode and defrost mode
When is the B terminal of the heat pump control board energized?
in heating mode only
In cooling mode only
In cooling mode and defrost mode
in heating mode and defrost mode

Solution
4.6(234 votes)

Answer

in cooling mode and defrost mode Explanation 1. Identify the function of the B terminal The B terminal is typically used for reversing valve operation in heat pumps. 2. Determine when the reversing valve is energized In most systems, the reversing valve is energized in cooling mode and defrost mode to switch the system from heating to cooling.

Explanation

1. Identify the function of the B terminal<br /> The B terminal is typically used for reversing valve operation in heat pumps.<br />2. Determine when the reversing valve is energized<br /> In most systems, the reversing valve is energized in cooling mode and defrost mode to switch the system from heating to cooling.
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