my Toyota Corolla E170 (2013-2019) AC is not cooling, what could be the problem

Toyota Corolla E170 (2013-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

554 words

Problem Statement

Learn how to diagnose and fix AC not cooling in Toyota Corolla E170 (2013-2019). 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

•Always wear safety goggles and gloves when handling refrigerants.
•Ensure the vehicle is off before disconnecting any electrical components.

Symptoms

•AC not blowing cold air
•Warm air from the vents when AC is activated
•AC compressor not engaging
•Unusual noises from the AC compressor
•Water pooling under the vehicle
•Increased humidity inside the cabin

Diagnostic Steps

1
Check the AC system for refrigerant level using a manifold gauge set.
2
Inspect the AC compressor operation by listening for engagement sounds when AC is turned on.
3
Examine the AC condenser for any visible damage or debris obstructing airflow.
4
Test the AC system for any leaks using UV dye or electronic leak detector.
5
Inspect the cabin air filter for clogs that may restrict airflow.
6
Scan the vehicle’s onboard computer for any trouble codes related to the AC system.

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

•Manifold gauge set
•Vacuum pump
•Socket set
•Torque wrench
•Compressed air

Parts Required

•Refrigerant (R-134a)
•AC compressor (if needed)
•Seals and O-rings for the compressor

Related Faults

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Diagnostic Steps

1
Check the AC system for refrigerant level using a manifold gauge set.
2
Inspect the AC compressor operation by listening for engagement sounds when AC is turned on.
3
Examine the AC condenser for any visible damage or debris obstructing airflow.
4
Test the AC system for any leaks using UV dye or electronic leak detector.
5
Inspect the cabin air filter for clogs that may restrict airflow.
6
Scan the vehicle’s onboard computer for any trouble codes related to the AC system.

Solution

1. Preparation

Gather tools and parts required.
Ensure the vehicle is parked on a level surface with the engine off and cool.
Disconnect the negative battery terminal to prevent electrical shock.

2. Recharge AC System

Tools Required: Manifold gauge set, refrigerant (R-134a), vacuum pump.
Connect the manifold gauge set to the AC service ports (low and high).
Check the low-pressure gauge; if below 30 psi, the system may be low on refrigerant.
If low, connect a vacuum pump to remove moisture and air from the system for about 30 minutes.
Recharge the system with the appropriate amount of refrigerant as specified in the owner’s manual.

3. Inspect and Replace AC Compressor

Tools Required: Socket set, torque wrench, AC compressor replacement.
Locate the AC compressor and inspect for any visible damage or signs of wear.
If the compressor is defective, disconnect the electrical connector and the refrigerant lines.
Remove the mounting bolts and take out the old compressor.
Install the new compressor, ensuring all seals are replaced and connections are secure.
Torque the bolts to the manufacturer’s specifications.

4. Clear Drainage System

Tools Required: Compressed air or a wire brush.
Locate the AC drainage tube under the vehicle.
Clear any clogs using compressed air or a wire brush to ensure proper water drainage.