Which of the following conditions will occur if the power element of the thermostatic expansion valve shown in the illustration loses its charge? GS-RA-07

Illustration GS-RA-07: the U.S. Coast Guard has not released this illustration.

Question

Which of the following conditions will occur if the power element of the thermostatic expansion valve shown in the illustration loses its charge? GS-RA-07

Illustration GS-RA-07: the U.S. Coast Guard has not released this illustration.

Accepted Answer

Option B: The valve will fail closed, providing no cooling capacity.. Loss of the volatile fluid charge in the power element removes the opening pressure force, causing the spring pressure to drive the needle firmly closed and halt all refrigerant flow.