What's likely happening:
The air conditioner's evaporator coil produces condensation. This water normally drains through a hose (the drain line) outside the vehicle. If this line is clogged (usually with dirt, debris, or mold), or disconnected, the water will back up and find its way into the car through various openings, often near the firewall or under the dashboard.
Troubleshooting and Repair:
1. Locate the Drain: The drain line's location varies slightly by vehicle, but it's typically near the evaporator core behind the glove box or under the dashboard. You'll likely need to remove parts of the dash or glove box for access. Refer to a repair manual specific to your 1996 Impala for exact location and instructions.
2. Check for Clogs: Once located, inspect the drain line for any clogs. Use a shop vac, compressed air (low pressure to avoid damaging anything), or a flexible wire (like a coat hanger) to clear any debris.
3. Check for Leaks or Disconnections: Carefully examine the drain hose for any cracks, holes, or disconnections. If it's damaged, you'll need to replace the section or the entire hose.
4. Check the Drain Pan: The evaporator coil sits in a drain pan. Make sure this pan isn't overflowing or cracked.
5. Address Mold and Mildew: If there's a significant mold or mildew problem, you'll want to clean the area thoroughly with a disinfectant after clearing the clog. A strong solution of bleach and water (following safety precautions) can be effective, but make sure to rinse thoroughly. Avoid using excessive amounts of water that could create further problems.
6. Consider Professional Help: If you're not comfortable working on your car's interior, or if you can't locate the drain line, it's best to take your Impala to a qualified mechanic. Improperly repairing the drain could lead to further damage.
Important Notes:
* Repair Manual: Obtaining a repair manual specific to your 1996 Chevrolet Impala is strongly recommended. It will provide diagrams and detailed instructions for accessing and repairing the AC drain line.
* Safety First: Always disconnect the battery's negative terminal before working on any electrical components in your vehicle.
* Water Damage: If water has already accumulated in your car's interior, address that promptly to prevent mold and mildew growth and potential damage to upholstery and electronics.
By systematically checking these points, you should be able to diagnose and fix the AC drain problem in your 1996 Impala. Remember safety and consult a professional if needed.
