What does Samsung Microwave E-33 Error - Causes & Fix mean?

E-33 means Under Weight Error: the microwave sees too little weight for the auto-cook mode. Reset power first, then check load size.

How do I fix Samsung Microwave E-33 Error - Causes & Fix?

Follow the step-by-step diagnosis below. The most likely fix is identified by checking power, sensor resistance, and control-board signals in order — using a multimeter and the part numbers documented in the parts reference table.

Can I keep running the equipment with 33 active?

Generally no. Faults on Appliance units are emitted when a sensor, safety, or control circuit is outside its operating envelope. Running through an active fault risks compressor, heater, or control-board damage. Diagnose and clear the fault first.

What part is most commonly replaced for Samsung Microwave E-33 Error - Causes & Fix?

The most frequently replaced parts for Samsung Microwave E-33 Error - Causes & Fix are listed in the Parts Reference section of this guide with OEM part numbers and typical price ranges. Check the table for direct replacements.

Is Samsung Microwave E-33 Error - Causes & Fix a DIY repair or do I need a technician?

Sensor swaps, fan motor replacements, and condenser cleaning are typical DIY-level repairs. Anything involving refrigerant, gas, or high-voltage (>240V) work requires a licensed technician for both safety and code-compliance reasons.

Samsung Microwave E-33 Error - Causes & Fix

Samsung Microwave E-33 Error — What It Means

The E-33 code on Samsung microwaves means Under Weight Error. The weight-sensing system detects a load below the minimum threshold required for the selected automatic or sensor-based cooking program, so the controller refuses to start the cycle. This can happen because the food or container is genuinely too light for the chosen mode, the wrong program was selected, or a component in the weight-sensing circuit is faulty and misreporting the load to the control board.

Jump to Fix

Common Causes

Food weight below program minimum The item on the turntable is lighter than the automatic cook mode requires, so the controller rejects the cycle.
Wrong auto-cook mode selected The chosen program expects a heavier load than what is actually in the cavity.
Faulty weight-sensing component A defect in the sensor or its signal path causes the control board to read the load as too light even when weight is normal.
Control board glitch or power interruption A temporary software fault, moisture, or interrupted power can trigger the code without a hardware failure.

Step-by-Step Fix

Unplug the microwave or switch off the circuit breaker, wait 60 seconds, then restore power to reset the controller.
Verify the load weight matches the minimum for the selected auto-cook or sensor program, and confirm you have chosen the correct mode for the food type.
Test with a different cook mode or use manual time/power settings to check whether the code appears only in weight-sensing modes.
Inspect the turntable and cavity for obstructions, moisture, or debris that could interfere with the weight-sensing mechanism.
Check harness connections at the control board and any visible sensor leads for looseness, corrosion, or damage.
Replace the faulty component if diagnostics confirm a defective weight sensor or control board interpretation circuit.
Consult the service manual for your model to identify the exact sensing hardware and board part numbers before ordering replacement parts.

Parts Often Needed

Part	Notes
Main control board (PCB)	Amazon \| Required if the fault is in the load-interpretation circuit. Match the exact model number.
Weight-sensing component	Amazon \| Model-specific sensor hardware, if separately serviceable. Confirm part number from the service diagram.

When to Call a Pro

Call a qualified appliance technician if the power reset does not clear the code or if E-33 returns after you have confirmed the load size and cooking mode are correct. Diagnosing the weight-sensing circuit and control board requires model-specific service documentation, a multimeter, and experience with microwave high-voltage safety. Samsung directs customers to professional service when the reset fails, and component-level repair involves parts that vary by model.