3mirrors Rear A/C Block Off Kit Instruction Manual

1. Product Overview

The 3mirrors Rear A/C Block Off Kit is designed to allow the front air conditioning system to operate independently by bypassing the rear A/C lines and evaporator. This solution helps to maintain a functional front A/C system without the need to repair or replace leaking rear components, offering a cost-effective alternative.

Image: Complete 3mirrors Rear A/C Block Off Kit components.

2. Compatibility

This kit is compatible with the following vehicle models and years:

• 2004-2011 Chrysler Town & Country
• 2004-2011 Dodge Grand Caravan

Note: While designed for these models, it is recommended to visually inspect your vehicle's rear A/C lines to confirm compatibility before installation, as some variations may exist.

3. Parts List

The 3mirrors Rear A/C Block Off Kit includes the following components:

• 2 x Aluminum Block-Off Fittings (M20 x 1.5 & M22 x 1.5)
• 2 x HNBR O-Rings (one green, one black)

Image: All components included in the kit.

4. Safety Information

WARNING: Automotive air conditioning systems contain pressurized refrigerant. Improper handling can lead to serious injury or property damage. Professional installation is highly recommended.

• Always wear appropriate personal protective equipment, including safety glasses and gloves, when working on A/C systems.
• Ensure the A/C system is completely discharged by a certified technician before attempting any work on the lines. Refrigerant can cause severe frostbite upon contact and is harmful if inhaled.
• Do not work on a pressurized A/C system.
• Refer to your vehicle's service manual for specific A/C system procedures and safety precautions.

5. Installation Instructions

5.1. Pre-Installation

1. Ensure the vehicle's engine is turned off and has cooled down.
2. Have the vehicle's A/C system professionally discharged to remove all refrigerant. This is a critical safety step.
3. Gather necessary tools: appropriate wrenches for A/C line fittings, O-ring pick, and clean refrigerant oil.

5.2. Installation Steps

1. Locate the rear A/C lines. On most 2004-2011 Dodge Grand Caravan and Chrysler Town & Country models, these lines are typically found underneath the vehicle, near the passenger side door area.
2. Carefully disconnect the existing rear A/C lines from the main A/C system. Be prepared for any residual refrigerant or oil.
3. Thoroughly clean the connection points on the main A/C lines where the block-off fittings will be installed. Ensure no dirt or debris is present.
4. Lightly lubricate the new HNBR O-rings with clean refrigerant oil (compatible with your A/C system, e.g., PAG oil for R-134a).
5. Place the lubricated O-rings onto the block-off fittings. Ensure they are seated correctly in their grooves.
6. Install the block-off fittings onto the disconnected main A/C lines. Hand-tighten first to ensure proper thread engagement.
7. Using appropriate wrenches, securely tighten the block-off fittings. Do not overtighten, but ensure a snug, leak-free connection.

Image: Example of block-off fittings installed on A/C lines.

Image: Installed block-off kit providing a sealed connection.

Video: A brief demonstration of the 3mirrors AC Block Off Kit components and their assembly.

5.3. Post-Installation

1. After installation, the A/C system must be evacuated using a vacuum pump to remove air and moisture. This process typically takes 30-60 minutes.
2. Recharge the A/C system with the correct type and amount of refrigerant (e.g., R-134a or R-1234yf) as specified by your vehicle manufacturer.
3. Perform a thorough leak check using an electronic leak detector or soapy water solution on all connections, especially the newly installed block-off fittings.
4. Start the vehicle and test the front A/C system to ensure proper cooling and operation.

6. Operation

Once the 3mirrors Rear A/C Block Off Kit is correctly installed and the A/C system is recharged, the front air conditioning system will operate as normal. The rear A/C lines and evaporator are now isolated, preventing refrigerant loss from that section of the system.

7. Maintenance

Minimal maintenance is required for the block-off kit itself. It is recommended to:

• Periodically inspect the block-off fittings for any signs of refrigerant leaks, corrosion, or damage.
• Ensure your vehicle's front A/C system maintains proper refrigerant levels according to manufacturer specifications.

8. Troubleshooting

9. Specifications

• Item Model Number: 018064CS01
• Manufacturer Part Number: 018064CS01
• OEM Part Numbers: 800-992, 800-995, 88878221, 88878224
• Item Weight: 2.39 ounces
• Package Dimensions: 4.1 x 3.4 x 0.9 inches
• Material: Quality engineered components with HNBR O-rings for enhanced durability and temperature resistance.

10. Warranty and Support

3mirrors is committed to providing high-quality automotive parts and offers lifetime after-sale service for this product. If you encounter any issues or have questions regarding the installation or performance of your Rear A/C Block Off Kit, please do not hesitate to contact the seller directly.

For further assistance, refer to the official 3mirrors brand store: 3mirrors Store on Amazon.