If a low-pressure switch has opened on a residential air conditioning system, it is usually an indication of a defective low-pressure control.

Question

Quizplus · Accepted Answer

While a defective low-pressure control could be a possible cause, it is not the only one. Other factors that could cause the low-pressure switch to open include low refrigerant levels, a clogged air filter, or a malfunctioning compressor.

If a Low-Pressure Switch Has Opened on a Residential Air