* Damage to the compressor: Overcharging can severely damage the compressor, a very expensive part to replace.
* Leaks: If you don't identify and fix the leak(s) before recharging, the refrigerant will simply escape again.
* Environmental harm: Refrigerant is harmful to the environment and should be handled by professionals with proper equipment for recovery and recycling.
Instead of attempting this yourself, I strongly recommend taking your Excursion to a qualified automotive air conditioning specialist or a reputable mechanic. They have the necessary tools, including:
* Refrigerant recovery and recycling machine: This machine safely removes the existing refrigerant from the system, allowing for proper recycling and preventing environmental harm.
* Vacuum pump: This evacuates the system of air and moisture before adding new refrigerant. Air and moisture can severely damage the compressor.
* Manifold gauge set: This precisely measures the pressure in the system to determine the correct amount of refrigerant to add.
* Leak detection equipment: This helps find the source of any leaks, which must be repaired before recharging.
What you *can* do yourself:
* Check for obvious leaks: Visually inspect the AC lines for any visible damage or leaks. Look for oily residue near the connections.
* Gather information: Note the make and model of your vehicle's AC compressor and the type of refrigerant it uses (usually R-134a for vehicles of this era, but check your owner's manual).
However, this is only a preliminary check. The professional will perform a thorough diagnosis and repair.
In short: Don't try to recharge your AC yourself. It's far safer and more cost-effective in the long run to have a professional handle it.
