Fisher & Paykel SmartLoad Dryer Code 4: Heat Source Option Link Invalid

What Code 4 means

On Fisher & Paykel SmartLoad and AeroSmart dryers such as the DEGX1, DGGX1, DE27CW1 and DG27CW1, Code 4 means the motor control module read an invalid heat source option link. That link tells the control which type of heating the dryer has. This code is not expected on standard US gas or electric models, so seeing it points to a control or wiring problem. The display shows the code.

Common causes of Code 4

A motor control module reading the option link incorrectly
A damaged or loose option link connection
A replacement control set up for the wrong configuration
A data problem on the motor control module

✓ One safe check you can try

1. Switch the dryer off at its breaker, wait about a minute, then switch it on again. 2. Start a short cycle and watch whether the code returns. 3. Do not open the cabinet or try to move any connectors. 4. If Code 4 comes back, write down the full model number and call us. Because this code is rare on US units, a technician should inspect it.

! Why to stop there

The option link is read by the motor control itself, so the cause sits inside the electronics.
A control with the wrong configuration may need to be replaced or set up correctly.
We check the model and the control together so the right part goes in.
A written price comes first, followed by a 30-day workmanship warranty.

Opening a panel yourself does not automatically cancel a manufacturer warranty, but it can cause accidental damage, and some manufacturers set their own service conditions. Check your warranty terms, or ask us, before deciding.

→Same appliance

Other Dryer codes

Code 14Fisher & Paykel SmartLoad Dryer Code 14: unstable sensor module reading Code 15Fisher & Paykel AeroSmart Dryer Code 15: unstable reading from sensor module Code 16Fisher & Paykel SmartLoad Dryer Code 16: airflow restriction Code 20Fisher & Paykel SmartLoad Dryer Code 20: door actuator stalled Code 21Fisher & Paykel SmartLoad Dryer Code 21: Door Actuator Needs Too Much Voltage Code 22Fisher & Paykel SmartLoad Dryer Code 22: Door Actuator Open Circuit Code 1Fisher & Paykel SmartLoad Dryer Code 1: sensor and motor control not talking Code 23Fisher & Paykel SmartLoad Dryer Code 23: Door Actuator Stopped by Low Line Voltage

Code 4Code 4 questions

What is a heat source option link?

It is a setting on the motor control that tells the dryer what kind of heating it uses. If the control cannot read it as valid, it reports Code 4.

Why is this code rare in the US?

It is not expected on standard US gas or electric models, so a repeat appearance usually points to the control module or its connection rather than anything you did.

Will a power reset help?

It may clear a one-time glitch. If the code returns on the next start, the control needs inspection, and resetting again will not fix it.