Hotpoint Dishwasher Error Code 10-3: Drying Fan Failure... | appliancefaults.com

Technical Background:

The MCU (Main Control Unit) sends a 120V AC signal to the drying fan via a relay on the control board. The fan then circulates hot air to dry the dishes. error code 10-3 is triggered when the MCU detects that the fan is not operating as expected.

Symptoms:

The dishwasher completes the wash cycle but the dishes are still wet. The drying cycle may not activate, or the dishwasher displays error code 10-3. You may hear no fan noise during the drying phase.

Possible Causes:

Failed drying fan motor
Wiring harness issue between the MCU and the drying fan
Faulty relay on the control board for the drying fan
Blockage preventing the fan from spinning freely
Corrupted software on the main control unit (MCU)

Solution:

1

Disconnect power to the dishwasher at the breaker panel.
2

Access the drying fan. Typically, this involves removing the lower access panel and potentially some internal panels. Refer to the service manual for the exact location and disassembly instructions.
3

Visually inspect the fan for any obstructions or damage. Ensure nothing is blocking the fan blades.
4

Disconnect the wiring harness from the drying fan motor. Use a multimeter to test the fan motor for continuity. A reading of infinity or zero ohms indicates a failed motor.
5

If the motor checks out, use a multimeter to check for 120V AC at the wiring harness connector when the dishwasher is in a drying cycle. If no voltage is present, the issue is likely with the control board or wiring.
6

Inspect the wiring harness for any breaks, shorts, or loose connections. Repair or replace the wiring as needed.
7

If voltage is present at the harness but the fan doesn't run, replace the drying fan motor. If there is no voltage, replace the control board.

Safety Warning:

Always disconnect power to the dishwasher at the breaker panel before performing any repairs. Lock Out/Tag Out (LOTO) procedures should be followed. 120V AC can cause serious injury or death.

Prevention:

Regularly inspect and clean the dishwasher interior. Ensure the drying fan is free from debris. Use rinse aid to improve drying performance and reduce strain on the drying fan.

Expert Tip:

Some Hotpoint dishwashers have a diagnostic mode. Check your service manual for the sequence to enter service mode. This mode may allow you to test the drying fan independently of the normal wash cycle. Typically, this involves pressing a combination of buttons within a specific time frame. For example: Press High Temp Wash, Heated Dry, High Temp Wash, Heated Dry within 5 seconds.

Frequently Asked Questions

•Where can I find the service manual for my Hotpoint dishwasher?

The service manual can often be found online by searching the model number followed by "service manual." AppliancePartsPros.com or similar websites are good resources. You can also contact Hotpoint directly.

•How do I know if the control board is faulty?

If you've checked the drying fan, wiring, and voltage supply, and all appear to be in working order, the control board is likely the issue. However, ensure all other components are thoroughly tested first, as control boards are a more expensive replacement.

•Is it possible to repair the control board instead of replacing it?

In some cases, a qualified electronics repair technician may be able to repair a faulty control board. However, this requires specialized knowledge and equipment. For most users, replacing the control board is the more practical solution.

Hotpoint Dishwasher Error Code 10-3: Drying Fan Failure Troubleshooting

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•Where can I find the service manual for my Hotpoint dishwasher?

•How do I know if the control board is faulty?

•Is it possible to repair the control board instead of replacing it?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: