Expansion Valve — Nissan Gravite
Category: AC | Severity: high | Cost: ₹3,000–₹9,000
What is Expansion Valve?
The expansion valve regulates refrigerant flow into the evaporator.
How Expansion Valve Works
It reduces refrigerant pressure and controls flow based on cooling demand.
Why is Expansion Valve Important?
Ensures proper cooling and prevents evaporator freezing.
Common Problems
- Blockage
- Sticking
- Leakage
Symptoms
- Uneven cooling
- Evaporator freezing
- Poor performance
Causes of Failure
- Contamination
- Moisture
- Wear
Impact on Car Performance
Leads to inefficient cooling and system imbalance.
DIY Fix Guide — Step by Step
- Check refrigerant pressure
- Inspect cooling performance
- Avoid contaminated refrigerant
- Replace if faulty
Maintenance Tips
- Use clean refrigerant
- Replace filter regularly
Replacement Cost in India
Estimated range: ₹3,000 – ₹9,000
Where to Buy Online
When to Replace Expansion Valve
Replace when cooling becomes inconsistent.