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Home/Cars/Honda/Pilot/Third Generation (2016-present)/why is my Honda Pilot's rear air conditioning not working

why is my Honda Pilot's rear air conditioning not working

Honda Pilot Third Generation (2016-present)

Severity: mediumDifficulty: medium2-4 hours
3 min read
524 words

Problem Statement

Learn how to diagnose and fix rear A/C issues in Honda Pilot. Step-by-step guide with symptoms, diagnostic steps, tools, and repair instructions.

Component
HVAC
Repair Time
2-4 hours

Safety Warnings

  • ⚠Disconnect the battery before working on electrical components.
  • ⚠Allow the engine to cool before inspecting any A/C components.

Symptoms

  • •Rear air conditioning vents blowing warm air
  • •Inconsistent airflow from rear vents
  • •Rear A/C controls not responding
  • •Unusual noises from the rear A/C unit
  • •Increased humidity inside the vehicle

Diagnostic Steps

  1. 1Check the rear A/C control settings to ensure they are set correctly.
  2. 2Inspect the rear A/C fuse for any signs of damage or failure.
  3. 3Use an OBD-II scanner to check for any related error codes.
  4. 4Examine the rear A/C blower motor for proper operation.
  5. 5Inspect the refrigerant levels in the A/C system.
  6. 6Check for any blockages in the rear A/C ductwork.

Solution

Solution

1. Preparation

  • Gather necessary tools and parts.
  • Ensure the vehicle is parked on a level surface and the engine is off.
  • Disconnect the negative battery terminal to avoid electrical shorts.

2. Inspect A/C Fuse

  • Locate the fuse box and identify the fuse for the rear A/C system (refer to the owner’s manual for the specific location).
  • Remove the fuse using a fuse puller and inspect it for continuity.
  • Replace with a new fuse of the same amperage if blown.

3. Check Rear A/C Blower Motor

  • Access the rear A/C blower motor (typically located under the rear passenger side).
  • Disconnect the wiring harness from the blower motor.
  • Use a multimeter to test for voltage at the blower motor connector when the A/C is on.
    • If no voltage is present, trace back to the control module or wiring.
    • If voltage is present, replace the blower motor.

4. Recharge A/C System

  • Attach a refrigerant gauge set to the A/C service ports (high and low).
  • Check the refrigerant levels and add refrigerant if the levels are low.
  • Follow the manufacturer's specifications for the correct type and amount of refrigerant.

5. Clear Duct Blockages

  • Inspect the rear A/C ductwork for any obstructions such as debris or leaves.
  • Remove any blockages to ensure proper airflow.

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

  • OBD-II scanner
  • Multimeter
  • Screwdriver set
  • Refrigerant gauge set
  • Fuse puller

Parts Required

  • Rear A/C blower motor (if needed)
  • A/C refrigerant
  • A/C fuse (if needed)

Additional Information

Component

HVAC

Repair Time

2-4 hours

Difficulty

medium

Severity

medium

Tools

5 items

Parts

3 items

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