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Error code reference

Samsung Air Conditioner Error Code 442

Prohibit heat filling mode for outdoor temperature over 59F/15C.

Samsung codesSamsung air conditioner codes
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What the 442 error code actually means

Your Samsung air conditioner is displaying this code because the outdoor temperature is too warm for a special startup heating function to run safely, so the system automatically blocked it. This is normal behavior and not a sign that something is broken. The only reason to investigate further is if the outdoor temperature is actually cold but the unit still shows this code, which could point to a faulty outdoor temperature sensor.

Diagnostic procedure

The full 442 procedure

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MyPros+ · DiagnosticsStep 1 preview
1
First diagnostic step
Check if there is any dislocation/problem with outdoor temp sensor; if outdoor temp measured normal, this is normal operation by protective control.
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Most common causes of 442

Ranked by how often they cause this code
  1. 1Normal protective control operation
  2. 2Dislodged outdoor temperature sensor
  3. 3Faulty outdoor temperature sensor
  4. 4Wiring harness issue between sensor and control board
  5. 5Control board misreading sensor input

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Questions people ask about 442

What does 442 mean on a Samsung air_conditioner?
Error code 442 on a Samsung air conditioner means the system has blocked heat filling mode because the outdoor temperature is at or above 59°F (15°C). This is a protective control function built into the unit. If the outdoor temperature is genuinely that warm, this is normal operation and not an actual fault. If outdoor temps are cold, inspect the outdoor temperature sensor for problems.
Is error code 442 on a Samsung air conditioner dangerous?
No, error code 442 is not a safety hazard. It reflects a protective control function that prevents an unnecessary operating mode from running in warm outdoor conditions. The system continues to operate normally in other modes. There is no risk of equipment damage or safety concern associated with this code.
Will resetting my Samsung air conditioner clear error code 442?
A reset may temporarily clear the display of the code, but if the outdoor temperature remains at or above 59°F (15°C), the code will return because the protective control logic will re-engage. If a faulty sensor is causing the code incorrectly, resetting will not resolve the underlying problem. The sensor issue must be diagnosed and corrected for the code to stay cleared.
How do I fix error code 442 on my Samsung air conditioner?
Start by confirming the actual outdoor temperature. If it is 59°F (15°C) or above, no fix is required since the system is working correctly. If outdoor temps are below that threshold, check the outdoor temperature sensor for physical dislocation, damaged wiring, or corroded connector pins. A sensor that reads incorrectly should be tested for proper resistance and replaced if it is out of specification.
How much does it cost to repair error code 442 on a Samsung air conditioner?
If the code is due to normal protective operation, there is no repair cost at all. If the outdoor temperature sensor is confirmed faulty, sensor replacement parts typically range from $15 to $60 depending on the model, with professional labor adding $75 to $200 depending on your location and service provider. Wiring repairs, if needed, are generally on the lower end of that labor range.

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