Problem Statement
Learn how to diagnose and fix the air conditioning system that won't turn off in a Toyota Corolla E170. Step-by-step guide with diagnostic procedures and repair instructions.
why is my Toyota Corolla E170 (2013-2019) air conditioning not turning off?
Toyota Corolla E170 (2013-2019)
2-4 hours
Time
medium
Difficulty
medium
Severity
3 min read
519 words
Affected Component
HVAC
Estimated Time
2-4 hours
⚠️ Safety Warnings
Important safety information - read before proceeding
- •Disconnect the battery before working on electrical systems.
- •Ensure the engine is off and cool before inspecting components near the engine.
Symptoms
- •Air conditioning compressor remains engaged continuously
- •Cabin temperature does not adjust despite changing settings
- •Increased fuel consumption noted during operation
- •Unusual noise from the AC compressor
- •Possible condensation or water pooling inside the vehicle
Diagnostic Steps
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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
- •OBD-II scanner
- •Multimeter
- •Socket set
- •Screwdriver set
Parts Required
- •AC relay (if defective)
- •AC fuse (if blown)
- •Temperature sensors (if faulty)
- •Blend door actuator (if faulty)
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