Retrieving a submersible borehole pump can be a complex and potentially hazardous operation, and several things can go wrong if not done correctly. Here are some common issues that can arise during the retrieval process:

1. Stuck or Jammed Pump: The pump may become stuck or jammed due to debris or sediment accumulation around the pump, which can make it difficult to lift. This can be challenging to address and may require additional equipment or techniques to dislodge the pump.
2. Cable or Pipe Breakage: The electrical cable or pipe used to lower and raise the pump can break or become damaged during retrieval. This can lead to costly repairs and downtime.
3. Damage to Pump Components: Mishandling or improper lifting techniques can lead to damage to the pump components, including the motor, impellers, and casing. This can result in the need for pump repairs or replacement.
4. Well Damage: If the retrieval process is not carefully controlled, it can lead to damage to the borehole or well casing. This can be particularly problematic if the well is in use for water supply or other purposes.
5. Loss of Pump in Borehole: In extreme cases there is a risk of losing the pump down the borehole, even if the retrieval process is well-planned and executed. This can be costly and time-consuming to rectify.

To minimize these risks, it’s crucial to follow established safety procedures, use appropriate equipment, and have trained personnel carry out the retrieval operation.