Final answer:
Water in the refrigerant of a Freon system can cause a clogged oil trap, frozen discharge valve, clogged scale trap, or frozen expansion valve.
Step-by-step explanation:
Any water present in the refrigerant side of a Freon refrigerating system can cause a clogged oil trap, frozen discharge valve, or clogged scale trap. It can also lead to a frozen expansion valve.
Water in the refrigerant can mix with the oil in the system and form sludge or blockages in the oil trap, causing it to become clogged. Additionally, when water freezes, it can block the discharge valve or scale trap. Finally, water can freeze and obstruct the expansion valve, preventing proper flow and temperature control in the system.