Compressor OLP Sensor Error
What it means
This code appears on Samsung inverter split wall units such as WindFree and Digital Inverter. It means the compressor overload protection (OLP) sensor, a temperature sensor that watches how hot the compressor gets in the outdoor unit, is giving an impossible reading because of an open or short circuit. The unit stops the compressor because it cannot protect it without this reading. The sensor type and position differ between outdoor units, and the same code can mean something else on other brands.
Models covered: Samsung inverter split air conditioners (e.g. WindFree and Digital Inverter wall units) that show three-digit E codes on the display.
Symptoms3
- E320 shows and the compressor does not run.
- The indoor fan, and sometimes the outdoor fan, runs without cooling.
- It may appear after service work on the outdoor unit or after it was moved.
Possible causes5
- Sensor plug loose or left disconnected after service.
- Sensor worn out by high compressor temperature over time.
- Wire cut or melted near the compressor.
- Moisture or corrosion in the plug.
- Faulty sensor input on the outdoor PCB.
How to diagnose5
- Switch off the breaker for a few minutes, then restart.
- After discharge, a technician locates the sensor per the Samsung manual for the model and checks its plug and wire.
- Measure the sensor and compare the reading with Samsung specification.
- Look for heat damage or melting on the wire near the compressor.
- If the sensor is good, check its input on the outdoor board.
How to fix5
- Reconnect and secure the plug.
- Repair the wire and fix it away from hot parts.
- Replace the protection sensor with the correct part for the model.
- Replace the outdoor PCB if its sensor input is faulty.
- Run the unit long enough and confirm the compressor runs and the code does not return.
Repair cost
In Saudi riyals; the highlighted part is the expected range for this fault.
In the Saudi market: SAR 80–2,500 (≈ USD 21–667)
Our prices come from the Saudi market, converted at a fixed rate (SAR 3.75 per USD). Prices in your country may differ a lot, so we show the cost level.
It is usually a sensor or wire repair at low cost; the top of the range covers the outdoor PCB.
Prices are rough estimates including the part and the technician’s fee, and vary with brand, model and part source.
Prices last updated: September 2026
Frequently asked questions
What is the difference between E320 and E465?
E320 means the protection sensor itself has an electrical fault. E465 means the compressor really was overloaded and the protection stopped it.
Is E320 common after service?
Yes. If the sensor plug was not reconnected or its wire was pinched during work on the outdoor unit, the code can appear.
Was this explanation helpful?
Tap the stars to rate; you can change it later.
What was wrong? (optional)
We never store your IP address, and your comment is not published. Details: Privacy policy · Terms and conditions
Report a mistake
Spotted something inaccurate? Tell us and we will review and correct it.
Report received — thank you
This is your private tracking link. It shows the status and our reply as soon as it is posted.
The link is saved in this browser only.
