Toyota Corolla E170 (2013-2019) AC not blowing cold air what's the issue

Toyota Corolla E170 (2013-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

489 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.
•Wear safety goggles and gloves when handling refrigerants.

Symptoms

•AC system blowing warm air
•AC compressor not engaging
•Unusual noises from the AC compressor
•Condensation or water pooling under the vehicle
•Check engine light illuminated (related to AC issues)

Diagnostic Steps

1
Check refrigerant levels using a manifold gauge set.
2
Inspect the AC compressor for signs of damage or wear.
3
Listen for the compressor clutch engagement when AC is turned on.
4
Examine the AC relay and fuses for continuity and functionality.
5
Inspect the cabin air filter for clogs or blockages.
6
Scan for any error codes using an OBD-II scanner.

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

•Safety goggles
•Gloves
•Manifold gauge set
•Basic socket set
•OBD-II scanner
•Multimeter

Parts Required

•Refrigerant (R-134a)
•Cabin air filter
•AC compressor relay (if faulty)

Related Faults

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Diagnostic Steps

1
Check refrigerant levels using a manifold gauge set.
2
Inspect the AC compressor for signs of damage or wear.
3
Listen for the compressor clutch engagement when AC is turned on.
4
Examine the AC relay and fuses for continuity and functionality.
5
Inspect the cabin air filter for clogs or blockages.
6
Scan for any error codes using an OBD-II scanner.

Solution

1. Preparation

Tools Required: Safety goggles, gloves, manifold gauge set, basic socket set, OBD-II scanner.
Disconnect the battery to prevent electrical shorts.

2. Check Refrigerant Levels

Connect the manifold gauge set to the low and high-pressure ports of the AC system.
Check the pressure readings against the manufacturer's specifications.
If low, proceed to recharge the system.

3. Recharge the AC System

Using a refrigerant can and gauge, add the specified type of refrigerant (typically R-134a).
Monitor the pressure while adding refrigerant until it reaches the recommended level.
Disconnect the gauges and ensure all caps are securely closed.

4. Inspect and Test the AC Compressor

Reconnect the battery.
Start the vehicle and turn on the AC to the maximum setting.
Check if the compressor engages; if not, inspect the electrical connections and replace the compressor if necessary.

5. Inspect the Cabin Air Filter

Locate and remove the cabin air filter compartment (usually behind the glove box).
Replace the filter if it’s dirty or clogged.

6. Replace AC Relay or Fuses (if necessary)

Locate the fuse box and identify the AC relay and fuses.
Test for continuity with a multimeter and replace any faulty components.