how to fix the rear AC not working in my Honda Pilot Third Generation (2016-present)

Honda Pilot Third Generation (2016-present)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

531 words

Problem Statement

Learn how to diagnose and fix rear AC issues in Honda Pilot Third Generation. Step-by-step guide with symptoms, diagnostic steps, and repair instructions.

Affected Component

HVAC

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical components.
•Follow appropriate safety protocols when handling refrigerants.

Symptoms

•Rear AC vents blowing warm air
•Rear AC controls unresponsive
•Unusual noises from the rear AC unit
•Poor air circulation from rear vents
•Front AC working while rear AC is not

Diagnostic Steps

1
Check the rear AC fuse in the fuse box for continuity.
2
Inspect the rear AC blower motor for any signs of damage or blockage.
3
Verify refrigerant levels in the AC system using a manifold gauge set.
4
Scan the vehicle's onboard diagnostic system for any error codes related to the HVAC system.
5
Check for any leaks in the rear AC lines or connections.

Solution

💡 Expert Tip

For complex repairs like this, consider taking photos at each step. This helps if you need to reverse a step or consult with a mechanic. Also, keep all removed parts organized - you may need to reference them during reassembly.

Verification

After completing the repair, verify that the issue has been resolved:

✓Test the affected component to ensure it functions correctly
✓Check for any error codes or warning lights
✓Monitor the vehicle for a few days to ensure the issue does not recur

Prevention Tips

To prevent this issue from occurring again:

•Follow the manufacturer's recommended maintenance schedule
•Address warning signs early before they develop into major issues
•Use quality parts and fluids recommended for your vehicle
•Keep detailed records of all repairs and maintenance

Tools & Equipment Required

•Fuse puller or needle-nose pliers
•Socket set
•Multimeter
•Manifold gauge set
•UV leak detection kit

Parts Required

•Rear AC fuse (if blown)
•Blower motor (if defective)
•Refrigerant (if low)

Related Faults

Share this solution

Comments

No comments yet

Be the first to share your thoughts

Back to Generation

Diagnostic Steps

1
Check the rear AC fuse in the fuse box for continuity.
2
Inspect the rear AC blower motor for any signs of damage or blockage.
3
Verify refrigerant levels in the AC system using a manifold gauge set.
4
Scan the vehicle's onboard diagnostic system for any error codes related to the HVAC system.
5
Check for any leaks in the rear AC lines or connections.

Solution

1. Preparation

Gather necessary tools and parts.
Disconnect the negative battery terminal to ensure safety.
Allow the vehicle to cool down if the AC has been running.

2. Inspect and Replace the Fuse

Tools Required: Fuse puller or needle-nose pliers
Locate the fuse box (usually under the dashboard or in the engine compartment).
Identify the rear AC fuse using the fuse diagram.
Remove the fuse and inspect it; replace it if it is blown.

3. Check and Replace the Blower Motor

Tools Required: Socket set, multimeter
Remove the rear interior panel to access the blower motor.
Disconnect the electrical connector from the blower motor.
Test the motor with a multimeter for continuity; replace if defective.
If functional, check for obstructions in the blower motor housing and clean if necessary.

4. Check Refrigerant Levels

Tools Required: Manifold gauge set
Connect the manifold gauges to the low and high-pressure ports of the AC system.
Start the engine and turn on the AC to the maximum setting.
Read and interpret the pressure levels; recharge the system if levels are low.

5. Inspect for Leaks

Tools Required: UV leak detection kit (if available)
Visually inspect all rear AC lines and connections for signs of refrigerant leaks.
If leaks are suspected, use a UV dye to identify the exact location.
Repair or replace any leaking components as necessary.