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Error code reference

Samsung Heat Pump Error Code E416

Prohibit starting by low pressure

Samsung codesSamsung heat pump codes
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What the E416 error code actually means

Your Samsung heat pump has detected that the refrigerant pressure inside the system is too low to safely start a key operating routine, so it has shut itself down to prevent compressor damage. This can happen because the system is low on refrigerant due to a leak, or because a sensor is reporting an incorrect pressure reading. A technician will need to check the actual refrigerant pressure with gauges and inspect the system before it can operate normally again.

Diagnostic procedure

The full E416 procedure

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1
First diagnostic step
Measure pressure using manifold gauge when system is stopped; read low pressure sensor value using view mode or S-net and compare.
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Most common causes of E416

Ranked by how often they cause this code
  1. 1Refrigerant leak reducing system pressure
  2. 2Faulty or out-of-range low pressure sensor
  3. 3Service valve left closed after maintenance
  4. 4Extremely low ambient temperature causing pressure drop
  5. 5Wiring fault or connector issue at the low pressure sensor

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Questions people ask about E416

What does E416 mean on a Samsung heat pump?
E416 means the system has detected that the low pressure sensor value is below the minimum threshold required to safely start a pump down sequence. The threshold is 3.1 kg/cm2G during cooling or 2.6 kg/cm2G during heating, measured for 3 consecutive seconds. The unit locks out to protect the compressor from operating in a critically low pressure condition. Both actual refrigerant loss and a faulty sensor can trigger this code.
Is it safe to keep running my heat pump with an E416 error?
No. The E416 lockout exists specifically to prevent the compressor from operating under dangerously low pressure conditions, which can cause severe compressor damage. Attempting to bypass or reset the lockout without addressing the underlying cause risks destroying the compressor, a repair that is significantly more costly than fixing the original problem.
Will resetting the heat pump clear the E416 error code?
A power reset may temporarily clear the error display, but the code will return within seconds if the underlying low pressure condition persists. Because the lockout triggers after just 3 consecutive seconds of below-threshold pressure, the system will detect the fault again almost immediately upon restart. A reset is only useful after the root cause, whether a leak, faulty sensor, or closed valve, has been correctly identified and repaired.
Can I fix E416 myself, or do I need a professional?
Diagnosing this error requires connecting manifold gauges to the refrigerant circuit and reading sensor data through view mode or S-net, which requires HVAC training and, in most regions, refrigerant handling certification. If the cause is a closed service valve, a knowledgeable technician or advanced DIYer may be able to resolve that specific issue. Any work involving refrigerant leak repair or recharging must be performed by a certified technician.
How much does it cost to repair an E416 error on a Samsung heat pump?
Repair costs vary widely depending on the root cause. A sensor replacement typically falls in the range of $150 to $400 including labor. Refrigerant leak detection, repair, and recharging commonly costs between $300 and $800 or more depending on leak location and refrigerant type. Compressor replacement, if damage has already occurred, can range from $1,200 to $3,000 or higher.

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