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Photograph of a
commercial air conditioning compressor charging gauge set (C) InspectAPedia.com Air Conditioner / Heat Pump Refrigerant Pressure Too Low - Undercharged
Effects of a low charge, under-charged refrigerant pressures and leaks: not enough refrigerant

Low refrigerant or refrigerant undercharge effects on air conditioners & heat pumps or other HVACR equipment:

This article explains the symptoms of and problems caused by not enough refrigerant in cooling equpment.

Refrigerant charge quantity for air conditioners & heat pumps:

This air conditioning repair article series discusses the the diagnosis and correction of abnormal air conditioner refrigerant line pressures as a means for evaluating the condition of the air conditioner compressor motor, which in turn, is a step in how we evaluate and correct lost or reduced air conditioner cooling capacity.

We explain how overcharging or undercharging of refrigerant in an air conditioner or heat pump is detected and we list the effects of overcharged or undercharged refrigerant. We also explain the various causes of liquid slugging a compressor motor.

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Effects of Undercharging the Refrigerant Level in an Air Conditioner, Heat Pump, or other refrigeration equipment

Photograph of a
commercial air conditioning compressor charging chartEffect of too little refrigerant in the system

When we undercharge an air conditioner, heat pump, or other refrigeration equipment

Bottom line about undercharging refrigerants: For residential equipment such as air conditioners, heat pumps, refrigerators, freezers, to work properly you must have exactly the correct charge in the system.

at FROST BUILD-UP on AIR CONDITIONER COILS we also explain that in a properly tuned and adjusted refrigeration system there will be liquid refrigerant found all the way to just at the end of the evaporator coil - this gives us maximum cooling efficiency of the equipment.

Effects of Overcharging the Refrigerant Level in an Air Conditioner, Heat Pump, or other refrigeration equipment

The effect of too much refrigerant in the system - overcharging, over-metering, or other high refrigerant pressure situations are detailed

at EFFECTS of OVER CHARGING of REFRIGERANT

If your air conditioning or heat pump system has lost its cooling capacity or won't start

see REPAIR GUIDE for AIR CONDITIONERS.


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Continue reading at THERMOSTATIC EXPANSION VALVE TEV INSTALL, DIAGNOSE, REPAIR or select a topic from the closely-related articles below, or see the complete ARTICLE INDEX.

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UNDER CHARGED REFRIGERANT, EFFECTS at InspectApedia.com - online encyclopedia of building & environmental inspection, testing, diagnosis, repair, & problem prevention advice.


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INDEX to RELATED ARTICLES: ARTICLE INDEX to AIR CONDITIONING & HEAT PUMPS

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