Jandy Pool Pump Error Code 4: How to Fix It

Easy 30-60 minutes Medium Severity Verified June 2026
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Error Code
4
Brand
Jandy
Product Type
pool_equipment
Severity
Medium
DIY Difficulty
Easy
Estimated Fix Time
30-60 minutes
Jandy pool pump error code 4 indicates that the Variable Frequency Drive (VFD) has overheated. This often happens when the pump is running at high speeds for extended periods, the ambient temperature is high, or the pump's ventilation is blocked. Follow these steps to cool down the pump and prevent future occurrences.
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Tools You'll Need

How to Fix Error Code 4

  1. Turn off Power to the Pump

    Always disconnect power before servicing electrical equipment to avoid shock.

  2. Check for Blocked Airflow

  3. Verify Ambient Temperature

  4. Reduce Pump Speed or Cycle

  5. Reset the Error Code

  6. Check the VFD Module (Advanced)

    Only attempt if you are comfortable with electrical components. Otherwise, call a technician.

Parts You May Need

VFD module
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VFD module
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VFD module
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VFD module
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When to Call a Professional

If error persists after cooling and cleaning, or if you suspect a faulty VFD module, contact a qualified pool technician. Do not attempt to replace the VFD yourself unless you are experienced with electrical systems.

Frequently Asked Questions

What does error code 4 mean on a Jandy pool pump?
Error code 4 indicates the Variable Frequency Drive (VFD) is overheating. This is a common issue that often resolves by letting the pump cool down and ensuring proper ventilation.
Can I run my Jandy pump with error code 4?
It is not recommended. Running the pump while overheated can cause damage. Turn off the pump and troubleshoot before restarting.
How do I reset error code 4 on a Jandy pump?
After the pump cools down, cycle power off at the breaker for a few minutes, then turn it back on. The error should clear. Some models have a reset button.
Why does my Jandy pump keep showing error code 4?
Recurring error 4 may be due to high ambient temperature, blocked ventilation, running at maximum speed continuously, or a failing VFD module. Address ventilation and speed settings first.
Will a Jandy VFD over temperature error go away on its own?
Yes, if the pump cools down and the underlying cause (like high load) is resolved, the error may clear. However, you should still investigate and fix the root cause.

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