why does my Toyota Corolla E170 (2013-2019) AC not blow cold air

Toyota Corolla E170 (2013-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

579 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, tools, 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.
•Always wear safety goggles and gloves when handling refrigerants.

Symptoms

•No cold air coming from the vents
•AC compressor not engaging
•Unusual noises from the AC system
•Warm air blowing instead of cold
•Visible refrigerant leaks near AC components
•Increase in engine temperature

Diagnostic Steps

1
Check the refrigerant level using a pressure gauge to ensure it is within specifications.
2
Inspect the AC compressor for signs of damage or failure.
3
Verify that the AC clutch is engaging when the system is turned on.
4
Examine the AC fuse and relay for any signs of failure.
5
Inspect the cabin air filter for blockages that may restrict airflow.
6
Scan for any error codes using an OBD-II scanner 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

•Refrigerant recharge kit
•Pressure gauge
•Socket set
•Wrench set
•AC manifold gauge set
•Vacuum pump

Parts Required

•Refrigerant (R134a)
•AC compressor (if replacing)
•Cabin air filter

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Diagnostic Steps

1
Check the refrigerant level using a pressure gauge to ensure it is within specifications.
2
Inspect the AC compressor for signs of damage or failure.
3
Verify that the AC clutch is engaging when the system is turned on.
4
Examine the AC fuse and relay for any signs of failure.
5
Inspect the cabin air filter for blockages that may restrict airflow.
6
Scan for any error codes using an OBD-II scanner related to the AC system.

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is parked on a level surface and the engine is off.
Disconnect the battery to prevent electrical hazards.

2. Recharge Refrigerant

Tools Required: Refrigerant recharge kit, pressure gauge.
Locate the low-pressure service port on the AC system.
Attach the refrigerant hose to the low-pressure port.
Start the vehicle and turn on the AC to maximum cold.
Add refrigerant according to manufacturer specifications while monitoring the pressure gauge.
Disconnect the hose and recap the service port.

3. Replace AC Compressor

Tools Required: Socket set, wrench set, AC manifold gauge set, vacuum pump.
Remove the front grill and any components obstructing access to the AC compressor.
Disconnect electrical connectors and refrigerant lines from the compressor.
Unbolt the compressor from its mounting bracket and remove it from the engine bay.
Install the new compressor by reversing the removal steps.
Ensure all connections are secure and torque bolts to manufacturer specifications.

4. Check and Replace Cabin Air Filter

Tools Required: None (may require a flathead screwdriver).
Locate the cabin air filter access panel, usually found behind the glove box.
Remove the panel and take out the old cabin air filter.
Clean the area and install the new cabin air filter in the correct orientation.
Reattach the access panel.

5. Recheck System Functionality

Reconnect the battery and start the vehicle.
Turn on the AC to check for cold air and proper operation.