how to fix the AC not blowing cold air in Toyota Corolla E170 (2013-2019)?

Toyota Corolla E170 (2013-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

530 words

Problem Statement

Learn how to diagnose and fix AC not blowing cold air 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

•Disconnect the battery before working on electrical systems.
•Use protective gloves when handling refrigerants.

Symptoms

•AC vents blowing warm air
•AC compressor not engaging
•Strange noises coming from the AC system
•Increased humidity inside the vehicle
•AC system cycling on and off frequently

Diagnostic Steps

1
Check the AC refrigerant level using a manifold gauge set.
2
Inspect the AC compressor for any visible damage or leaks.
3
Verify that the AC compressor is engaging when the system is turned on.
4
Inspect the AC condenser for clogs or debris obstructing airflow.
5
Examine the air cabin filter for dirt and blockages.
6
Use an OBD-II scanner to check for any related error codes.

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
•Refrigerant canister
•Protective gloves
•Socket set
•Torque wrench
•Refrigerant recovery machine
•Hose
•Soft brush

Parts Required

•AC compressor (if defective)
•AC condenser (if damaged)
•Cabin air filter

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Diagnostic Steps

1
Check the AC refrigerant level using a manifold gauge set.
2
Inspect the AC compressor for any visible damage or leaks.
3
Verify that the AC compressor is engaging when the system is turned on.
4
Inspect the AC condenser for clogs or debris obstructing airflow.
5
Examine the air cabin filter for dirt and blockages.
6
Use an OBD-II scanner to check for any related error codes.

Solution

1. Preparation

Gather necessary tools and materials.
Disconnect the battery to ensure safety while working on electrical components.

2. Check and Recharge Refrigerant

Tools Required: Manifold gauge set, refrigerant canister, protective gloves.
Attach the manifold gauges to the low and high-pressure service ports.
Check the pressure readings; if low, proceed to recharge.
Follow the manufacturer’s guidelines to add refrigerant until correct pressure is reached.
Disconnect the gauges and recheck the system operation.

3. Inspect and Replace AC Compressor (if needed)

Tools Required: Socket set, torque wrench, refrigerant recovery machine.
If the compressor is not engaging, check the electrical connections and fuses.
If defective, recover refrigerant and remove the old compressor using the socket set.
Install the new compressor, ensuring all bolts are torqued to specification.
Reconnect electrical connections and recharge the AC system.

4. Clean or Replace AC Condenser

Tools Required: Hose, soft brush, cleaning solution.
Inspect the condenser for dirt or debris.
If dirty, clean using a soft brush and water. For stubborn grime, use an appropriate cleaning solution.
If damaged, remove the old condenser and install a new one.

5. Replace Cabin Air Filter

Tools Required: None (may require a flathead screwdriver).
Locate the cabin air filter access panel, usually behind the glove box.
Remove the old filter and install a new one, ensuring correct orientation for airflow.