During a diagnostic check, finding both high head pressure and low suction pressure in an R22 system likely requires which type of action?

Finding both high head pressure and low suction pressure in an R22 system often indicates a restriction in the refrigerant flow. This imbalance suggests that the refrigerant is not circulating properly, which is typically due to blockages in the system. When there is a blockage, the refrigerant is unable to return to the compressor adequately, leading to high pressures on the discharge side (head pressure) and low pressures on the suction side.

Inspecting for blockages involves checking components such as the expansion valve, evaporator coil, or any filters that might be obstructed. By finding and addressing these blockages, the system can regain normal refrigerant flow, allowing it to function efficiently again.

Refrigerant changes, system recharges, or cleaning coils wouldn't resolve the underlying issue of flow restriction caused by blockages, making inspection for these obstructions the essential first step in the diagnostic and repair process.