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Error code reference

LG Heat Pump Error Code P713

Outdoor unit SUMP DOWN 1 protection control (SUMP temperature maintains over 95°C for 5 minutes).

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What the P713 error code actually means

This error means the heat pump detected that a temperature-sensitive area at the base of the outdoor unit's compressor got dangerously hot and stayed that way for too long. The system shut itself down to prevent serious internal damage. A technician needs to inspect the compressor and a related control valve before the unit is safely restarted.

Diagnostic procedure

The full P713 procedure

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MyPros+ · DiagnosticsStep 1 preview
1
First diagnostic step
Check loading/unloading of digital compressor; check PWM valve.
More steps, wiring diagram references, and verified part numbers
Includes expected resistance and voltage values, connector pinouts, and supersession notes for replacement parts.
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Most common causes of P713

Ranked by how often they cause this code
  1. 1Faulty or stuck PWM valve
  2. 2Digital compressor loading mechanism failure
  3. 3Low or incorrect refrigerant charge
  4. 4Oil return restriction or low oil level
  5. 5Failed sump temperature sensor

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Questions people ask about P713

What does P713 mean on a LG heat_pump?
P713 indicates that the outdoor unit's compressor sump temperature exceeded 95°C and held that level for 5 minutes or more, triggering a protection shutdown. The control system activates this fault to prevent compressor damage from sustained overheating. The most likely causes involve the digital compressor's loading behavior or the PWM valve that controls it.
Is it safe to keep running my heat pump with a P713 error?
No. The P713 protection control is designed to shut the system down before serious compressor damage occurs. Bypassing or repeatedly resetting this fault without addressing the root cause can result in compressor failure, which is a much more costly repair than the original fault cause.
How much does it cost to repair a P713 fault on an LG heat pump?
Repair costs vary widely depending on the root cause. PWM valve replacement typically falls in the range of $150 to $400 including labor. If the digital compressor itself requires replacement, costs can range from $800 to $2,500 or more depending on unit size and labor rates. A diagnostic service call to identify the specific cause is the recommended first step.
Can I fix P713 myself, or do I need a technician?
This fault requires professional diagnosis. Checking and replacing a PWM valve, evaluating digital compressor loading behavior, and verifying refrigerant charge all require specialized tools and certifications. Attempting repairs without proper equipment risks compressor damage or refrigerant release.
Will resetting the unit clear the P713 error?
A power reset may temporarily clear the fault code, but the error will return quickly if the underlying issue is not resolved. Because the fault triggers after 5 continuous minutes above 95°C, the condition that caused it will likely reproduce the fault within the same operating cycle. A proper diagnosis must be completed first.

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