Technician A is correct. technician a says that the water pump is defective.
Frequently asked questions include "Why is my central air not working?" The most frequent causes of central air conditioning system failure are coolant running out too quickly, clogged or unclean air filters, frozen coils, and electrical problems. While there is a remote possibility that there is a problem with your engine's operating temperature, a broken thermostat is by far the most frequent cause of trouble code P0128. Returning liquid can lead to compressor failure even though it may appear to be a straightforward problem.
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