The air temperature associated with a direct reciprocating air conditioning plant is found to be too warm, and the compressor is not operating. A service check determines the compressor suction pressure to be above the normal cut-in point, with a normal head pressure, and high evaporator superheat. Which of the following could be the cause of this problem?

Question

Accepted Answer

Option A: The low pressure control contacts are stuck open.. A compressor failing to start combined with an open low-side pressure control indicates that suction pressure has dropped below the cut-in threshold or the switch contacts are mechanically stuck open, preventing automatic compressor actuation.