why does my Honda Pilot YF3 (2016-2022) AC compressor click on and off

Honda Pilot Third Generation (2016-present)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

4 min read

626 words

Problem Statement

Learn how to diagnose and fix the AC compressor clicking issue in Honda Pilot YF3 (2016-2022). Step-by-step guide with diagnostic procedures 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 systems
•Ensure the engine is cool before inspecting components

Symptoms

•AC compressor makes a clicking sound when engaging and disengaging
•Inconsistent cabin temperature; AC may blow warm air intermittently
•Reduced cooling capacity
•Possible increase in engine load or RPM fluctuation
•AC system pressure readings may be abnormal

Diagnostic Steps

1
Scan for error codes using OBD-II scanner
2
Check refrigerant levels using a manifold gauge set
3
Inspect electrical connections to the AC compressor for damage or corrosion
4
Test the AC relay for proper operation with a multimeter
5
Inspect the AC pressure switch to ensure it is functioning correctly
6
Visually inspect the condenser and evaporator for blockages, dirt, or damage

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

•OBD-II scanner
•Manifold gauge set
•Multimeter
•Basic hand tools (screwdrivers, wrenches)

Parts Required

•Refrigerant (R-1234yf)
•AC relay
•AC pressure switch

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Diagnostic Steps

1
Scan for error codes using OBD-II scanner
2
Check refrigerant levels using a manifold gauge set
3
Inspect electrical connections to the AC compressor for damage or corrosion
4
Test the AC relay for proper operation with a multimeter
5
Inspect the AC pressure switch to ensure it is functioning correctly
6
Visually inspect the condenser and evaporator for blockages, dirt, or damage

Solution

1. Preparation

Tools Required: OBD-II scanner, manifold gauge set, multimeter, basic hand tools (screwdrivers, wrenches).
Safety Warnings: Disconnect the battery before working on electrical systems. Ensure the engine is cool before inspecting components.

2. Recharge Refrigerant (if low)

Sub-steps:
1. Connect the manifold gauge set to the low and high-pressure ports of the AC system.
2. Start the engine and turn the AC to the maximum setting.
3. Check the pressure readings; if low, proceed to add refrigerant according to the manufacturer's specifications.
4. Use the correct refrigerant type (R-1234yf for 2016-2022 Honda Pilot) and follow the proper procedure to avoid overcharging.

3. Replace AC Relay (if faulty)

Sub-steps:
1. Locate the AC relay in the fuse box (refer to the owner's manual for the exact location).
2. Remove the faulty relay using a pulling tool or by hand.
3. Insert a new relay of the same specification and ensure it is seated properly.

4. Replace AC Pressure Switch (if faulty)

Sub-steps:
1. Disconnect the battery and locate the AC pressure switch (usually found on the accumulator or near the compressor).
2. Disconnect the electrical connector from the switch.
3. Use a wrench to remove the old switch and install the new one, ensuring it’s properly torqued.
4. Reconnect the electrical connector and battery.

5. Clean or Replace Components (if necessary)

Sub-steps:
1. Inspect the condenser and evaporator for debris or blockages.
2. Clean the condenser fins with compressed air or a soft brush.
3. If the evaporator is clogged, consider removing it for cleaning or replacement.