Find the correct overload number according to the HP size of your refrigerator compressor. Use this simple tool to match the overload protector for your fridge or freezer compressor safely and accurately.
🔍 Select Compressor HP Size
What Is an Overload Protector?
An overload protector is a small thermal safety device usually attached to the compressor terminal.
Its job is simple — it protects the compressor by:
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Disconnecting the power supply instantly
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Automatically resetting when the compressor cools down
If the overload number doesn’t match the compressor’s capacity, it can cause frequent tripping, low cooling, or even a burnt compressor.
Why Matching Overload Number Is Important
Each compressor has a different horsepower (HP) and running current (Amps).
The overload is selected based on this running current.
If you use a low-rated overload, it will trip again and again, stopping the cooling process.
If you use a high-rated overload, it won’t trip at the right time — and the compressor may burn.
That’s why it’s important to trace the correct overload number according to the compressor’s HP rating.
Fridge Compressor HP Size and Common Overload Numbers
| Compressor Size (HP) | Approx. Current (Amp) | Common Overload Number |
|---|---|---|
| 1/12 HP | 1.2A | 103N0011 or 103N0003 |
| 1/10 HP | 1.5A | 103N0005 or 103N0015 |
| 1/8 HP | 1.8A | 103N0016 |
| 1/6 HP | 2.0A | 103N0018 or 103N0020 |
| 1/5 HP | 2.3A | 103N0021 or 103N0023 |
| 1/4 HP | 2.6A | 103N0024 or 103N0026 |
| 1/3 HP | 3.0A | 103N0028 or 103N0030 |
| 1/2 HP | 3.4A | 103N0032 or 103N0034 |
| 3/4 HP | 4.0A | 103N0040 |
| 1 HP | 5.0A | 103N0050 |
These overload numbers are mostly used in Danfoss, LG, Samsung, Tecumseh, and Embraco compressors — but always verify with the compressor’s nameplate or technical manual.
How to Trace Overload Number by HP Size
If you’re not sure which overload fits your fridge compressor:
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Check the compressor label — note the HP and current (Amp) rating.
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Match it with the chart above — find the overload number near that range.
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Confirm with a multimeter — measure actual running current.
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Install the matched overload — this ensures full protection.
Example:
If your compressor is 1/3 HP, its running current is around 3.0A.
So, the correct overload would be 103N0028 or 103N0030.
Benefits of Using the Right Overload
✅ Protects compressor from overheating
✅ Prevents repeated tripping
✅ Improves cooling performance
✅ Increases compressor life
✅ Saves repair and electricity cost
Tips for Technicians
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Always match overload rating with compressor current (Amp).
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Avoid using “universal” overloads unless rated properly.
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Replace both overload and relay if the compressor fails frequently.
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Check for blocked airflow or dirty condenser before blaming overload.
Conclusion
Finding the correct overload number according to the compressor HP size is one of the most important steps in refrigerator repair.
A correctly matched overload not only protects the compressor but also ensures reliable cooling and energy efficiency.
Use the overload chart as a quick reference whenever you replace or test a compressor.
Tags:
#FridgeOverload #CompressorProtection #HVACTechnician #RefrigeratorRepair #Fully4WorldHVAC
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