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

546 words

Problem Statement

Learn how to diagnose and fix the AC not blowing cold air in your 2013-2019 Toyota Corolla E170. Step-by-step guide with tools and tips included.

Affected Component

HVAC

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical components.
•Always wear safety goggles and gloves when handling refrigerants.

Symptoms

•Warm air blowing from the AC vents
•AC compressor not engaging
•Unusual noises from the AC system
•AC system running continuously without cooling
•Fogging on the inside of the windshield in humid conditions

Diagnostic Steps

1
Check the AC system's refrigerant level using a manifold gauge set.
2
Inspect the AC compressor for any signs of damage or leaks.
3
Test the AC compressor relay for proper function using a multimeter.
4
Examine the cabin air filter for blockages or dirt.
5
Scan the vehicle's onboard computer for any error 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
•Multimeter
•Socket set
•Torque wrench
•Refrigerant recovery machine

Parts Required

•R134a refrigerant
•AC compressor (if needed)
•Cabin air filter

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Diagnostic Steps

1
Check the AC system's refrigerant level using a manifold gauge set.
2
Inspect the AC compressor for any signs of damage or leaks.
3
Test the AC compressor relay for proper function using a multimeter.
4
Examine the cabin air filter for blockages or dirt.
5
Scan the vehicle's onboard computer for any error codes related to the AC system.

Solution

1. Preparation

Gather tools and parts needed.
Disconnect the vehicle's battery to ensure safety.
Ensure the vehicle is parked on a flat surface and the engine is off.

2. Check and Recharge Refrigerant

Tools Required: Manifold gauge set, refrigerant (R134a).
Connect the manifold gauge set to the low-pressure and high-pressure service ports.
Check the readings to determine if the refrigerant level is low.
If low, follow the manufacturer's instructions to add the appropriate amount of R134a refrigerant.

3. Inspect and Replace AC Compressor

Tools Required: Socket set, torque wrench, refrigerant recovery machine.
Remove the drive belt from the AC compressor by loosening the tensioner pulley.
Disconnect the electrical connector from the AC compressor.
Remove the mounting bolts securing the compressor.
Pull the compressor out and replace it with a new one, ensuring all seals are intact.
Reconnect the electrical connector and reinstall the drive belt.

4. Replace Cabin Air Filter

Tools Required: None (may require a flathead screwdriver).
Locate the cabin air filter compartment, usually behind the glove box.
Remove any screws or clips securing the glove box and lower it.
Take out the old cabin air filter and replace it with a new one.
Reassemble the glove box and secure it back in place.

5. Test the System

Reconnect the vehicle's battery.
Start the engine and turn on the AC to the maximum setting.
Monitor the air temperature from the vents to ensure it is blowing cold air.