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

Toyota Corolla E170 (2013-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

580 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 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.
•Allow the engine to cool before starting work on the AC system.

Symptoms

•AC compressor not engaging
•Warm air blowing from vents
•Unusual noises from the AC compressor
•Moisture or refrigerant leaks under the vehicle
•AC system blowing air inconsistently

Diagnostic Steps

1
Check the AC refrigerant level using a pressure gauge.
2
Inspect AC fuse and relay for continuity and functionality.
3
Examine the AC compressor for physical damage and listen for unusual noises.
4
Check the cabin air filter for blockages or dirt.
5
Inspect for any visible refrigerant leaks around the compressor and hoses.
6
Use an OBD-II scanner to check for relevant fault 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

•AC refrigerant recharge kit
•Pressure gauge
•Safety goggles
•Screwdriver
•Socket set
•Torque wrench
•Refrigerant recovery machine

Parts Required

•AC refrigerant (R-134a)
•Cabin air filter
•AC compressor (if needed)

Related Faults

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Diagnostic Steps

1
Check the AC refrigerant level using a pressure gauge.
2
Inspect AC fuse and relay for continuity and functionality.
3
Examine the AC compressor for physical damage and listen for unusual noises.
4
Check the cabin air filter for blockages or dirt.
5
Inspect for any visible refrigerant leaks around the compressor and hoses.
6
Use an OBD-II scanner to check for relevant fault codes.

Solution

1. Preparation

Gather tools and parts before starting.
Ensure the vehicle is parked on a level surface and the engine is off.
Disconnect the battery for safety.

2. Recharge the AC System

Tools Required: AC refrigerant recharge kit, pressure gauge, safety goggles.
Attach the low-pressure side of the AC gauge to the service port.
Check the pressure; if low, proceed to recharge.
If necessary, add the appropriate type of refrigerant according to the manufacturer’s specifications (usually R-134a for this model).
Monitor the pressure while adding refrigerant to ensure it reaches the proper level.

3. Replace the Cabin Air Filter

Tools Required: Screwdriver (if applicable).
Locate the cabin air filter compartment (usually behind the glove box).
Remove the glove box or cover to access the filter.
Take out the old cabin air filter and check for dirt or blockages.
Insert the new cabin air filter, ensuring it is oriented correctly based on airflow direction.

4. Inspect and Replace the AC Compressor (if necessary)

Tools Required: Socket set, wrenches, torque wrench, refrigerant recovery machine.
Remove the drive belt from the AC compressor by loosening the tensioner.
Disconnect the electrical connector from the compressor.
Use a refrigerant recovery machine to safely remove refrigerant from the system.
Remove the AC lines connected to the compressor (ensure proper sealing).
Unbolt the compressor from its mounting bracket and remove it from the engine bay.
Install the new compressor by reversing the removal steps, ensuring all connections are tight.
Refill the AC system with the correct amount of refrigerant.