What Does Error Code F3 Mean?

Error F3 on your Whirlpool Dishwasher means: Error code F3 on your Whirlpool Dishwasher indicates a problem with the wash temperature sensor. This sensor is responsible for monitoring the temperature of the wash water and ensuring it reaches the correct level for the selected cycle. If the sensor fails, the dishwasher may not heat the water properly or may display the F3 error code.

What You'll Need

🔧 Tools

Multimeter (digital or analog)
Phillips
T20 Torx screwdriver

🛒 Parts

Wash Temperature Sensor

How to Fix Error F3 — Step by Step

1

Step 1: Reset the Dishwasher

The first step in troubleshooting the F3 error code is to reset the dishwasher. Press and hold the 'Heated Dry' button for 3 seconds, then release it. Next, press and hold the 'Heated Dry' button again for 3 seconds. This will reset the dishwasher's memory and may resolve the issue. Check if the F3 error code has cleared after the reset.

💡 Pro Tip: If you've recently experienced a power outage, try resetting the dishwasher to see if it resolves the issue.
2

Step 2: Check the Wash Temperature Sensor

Locate the wash temperature sensor, which is usually located at the bottom of the dishwasher or near the heating element. Use a multimeter to measure the resistance of the sensor. The resistance should be around 100-200 ohms. If the resistance is outside this range, the sensor may be faulty.

💡 Pro Tip: Make sure to consult your dishwasher's user manual for the location of the wash temperature sensor.
3

Step 3: Inspect the Sensor Wiring

Inspect the wiring connected to the wash temperature sensor for any signs of damage or wear. Check for any loose connections or corrosion. If you find any issues, repair or replace the wiring as needed.

💡 Pro Tip: Use a multimeter to check for any voltage drops or short circuits in the wiring.
4

Step 4: Replace the Wash Temperature Sensor

If the sensor is faulty, replace it with a new one. Make sure to purchase a genuine Whirlpool part or a compatible aftermarket replacement. Follow the manufacturer's instructions for installation and ensure all connections are secure.

💡 Pro Tip: When installing a new sensor, make sure to calibrate it according to the manufacturer's instructions.
5

Step 5: Check the Heating Element

If the sensor is working properly, the issue may be with the heating element. Check the heating element for any signs of damage or wear. Use a multimeter to measure the resistance of the heating element. The resistance should be around 10-20 ohms. If the resistance is outside this range, the heating element may be faulty.

💡 Pro Tip: Make sure to consult your dishwasher's user manual for the location of the heating element.
6

Step 6: Replace the Heating Element

If the heating element is faulty, replace it with a new one. Make sure to purchase a genuine Whirlpool part or a compatible aftermarket replacement. Follow the manufacturer's instructions for installation and ensure all connections are secure.

💡 Pro Tip: When installing a new heating element, make sure to calibrate it according to the manufacturer's instructions.

When to Call a Professional

If you'd rather not risk further damage to the appliance, or if you've tried the above steps and the issue persists, book a service appointment with a certified repair company. This is especially important if your appliance is still under warranty.

Diagnostic Flowchart

Follow this visual guide to systematically diagnose Error F3:

Diagnostic Flowchart — F3

Understanding Error Code F3

The Whirlpool Dishwasher error code F3 is a common issue that can occur due to a malfunctioning wash temperature sensor or heating element. The sensor is responsible for monitoring the temperature of the wash water and ensuring it reaches the correct level for the selected cycle. If the sensor fails, the dishwasher may not heat the water properly or may display the F3 error code. Learn more about common causes of error code F3.

Common Causes

Here are the most common causes of the F3 error code:

Faulty wash temperature sensor: The sensor may be damaged or worn out, causing the F3 error code to appear. Check your wash temperature sensor.
Heating element malfunction: The heating element may be damaged or worn out, preventing the dishwasher from heating the water properly. Check your heating element.
Wiring issues: Corrosion or loose connections in the wiring connected to the wash temperature sensor or heating element can cause the F3 error code. Inspect your sensor wiring.

Extra Tips

If you’re dealing with other Whirlpool dishwasher errors, check out our guides for error F1 (control board fault) and error F5 (door switch issue). For drainage problems, see our error F9 guide.

Make sure to consult your dishwasher’s user manual for specific instructions on troubleshooting and repairing the F3 error code.
If you’d rather not risk further damage to the appliance, book a service appointment with a certified repair company.
Preventive maintenance tips: Regularly check the wash temperature sensor and heating element for any signs of damage or wear. Ensure all connections are secure and the wiring is free from corrosion.
Cost estimates: Replacing the wash temperature sensor or heating element can cost between $50 to $200, depending on the model and brand of the dishwasher.
Warranty information: Check your dishwasher’s warranty to see if it covers repairs or replacements for the wash temperature sensor or heating element. Contact Whirlpool’s customer support at 1-866-698-2538 for more information.

Beyond DIY: Professional Repair Indicators

If you’d rather not risk further damage to the appliance, or if you’ve tried the above steps and the issue persists, book a service appointment with a certified repair company. This is especially important if your appliance is still under warranty.

What Does Whirlpool Dishwasher Error Code F3 Mean?

When a Whirlpool dishwasher shows the F3 error, it’s telling you that the wash‑temperature sensor is giving a bad signal. This sensor sits at the bottom of the tub and watches the water temperature during a cycle. If the sensor is broken or its wiring is damaged, the control board thinks the water isn’t hot enough and stops the wash. The result is a cycle that never finishes and the display flashes “F3”.

The sensor is essential because the dishwasher heats water to a precise temperature—usually between 120°F and 140°F—to kill germs and dissolve detergent. When the sensor fails, the water may stay too cool, leaving dishes dirty and the machine stuck in error mode. Fixing the sensor restores normal operation and keeps your dishes clean.

Common Causes of Error F3

Faulty sensor – The most frequent culprit is a sensor that has burned out or corroded. This is common after long use or in humid kitchens.
Damaged wiring – The thin wires that connect the sensor to the control board can fray or break, especially if the dishwasher is bumped or the door seal is worn.
Water leaks – A leak from the hot‑water line can cool the sensor, causing a false low‑temperature reading.
Electrical surge – A sudden power spike can fry the sensor’s electronics, making it unresponsive.
Improper installation – If a replacement sensor isn’t seated correctly, it may not make full contact and will report the wrong temperature.
Age and wear – After many years, the sensor’s internal components can degrade, leading to intermittent readings.

How to Prevent Error F3

Check the door seal – A tight seal keeps hot water inside. Replace a worn gasket every few years to avoid leaks that cool the sensor.
Inspect wiring regularly – Every 2‑3 years, look for frayed or cracked wires. If you spot damage, replace the cable before it causes an error.
Keep the water inlet clean – Mineral buildup can reduce water temperature. Use a descaling agent once a year to keep the inlet and sensor free of deposits.
Avoid overloading – Stacking dishes can block water flow, making the sensor think the water is cooler than it really is. Load the dishwasher loosely.
Use a surge protector – Protect the appliance from power spikes that can damage the sensor’s electronics.

What This Repair Typically Costs

Repair Type	DIY Cost	Professional Cost
Wash temperature sensor (part # WT‑100)	$15–$25	$15–$25
Labor (if DIY)	$0	$0
Labor (professional)	–	$75–$120
Total (DIY)	$15–$25	–
Total (Professional)	–	$90–$145

Notes:

Prices vary by region and model.
Some models, like the WDT‑1200, may use a different sensor part number (WT‑200).
If the heating element also fails, add $70–$120 for a new element and $50–$90 for labor.

Frequently Asked Questions

Q1: Can I skip replacing the sensor if the dishwasher still works?
A1: If the dishwasher runs but dishes stay damp, the sensor may be giving a false reading. It’s safer to replace it to avoid future errors.

Q2: How long does a new sensor last?
A2: A good quality sensor can last 8–10 years, but this depends on usage and water quality.

Q3: Will a DIY fix void my warranty?
A3: Most Whirlpool warranties cover parts, not labor. If you’re still under warranty, check the terms before opening the unit.

Q4: What if the F3 code disappears after a reset?
A4: A reset may clear a temporary glitch, but if the code returns, the sensor or wiring is still faulty.

Q5: Is the wash temperature sensor the same as the heating element?
A5: No. The sensor monitors temperature; the heating element actually heats the water. A faulty sensor can make it look like the heater is bad, but they are separate parts.

Related Whirlpool Dishwasher Error Codes

Related Troubleshooting Guides

These guides cover similar issues you might find helpful:

Did This Fix Work?

Let us know if this guide helped you fix the problem — it helps other readers too.

Questions & Comments

Have a question about this repair or want to share your experience? Leave a comment below.

No comments yet. Be the first to share your experience!