Whirlpool Dryer Error Code E4

E4 on a Whirlpool gas dryer indicates a Bottom Radiant Sensor fault. It means the dryer attempted to ignite the burner but never received the expected 120V confirmation signal from the radiant sensor within the allotted time. This points to a failure somewhere in the ignition circuit, which includes the igniter, gas valve coils, radiant sensor, or the gas supply itself.

The E4 fault itself is a protective response: the control board detected that the burner did not light successfully and stopped the ignition sequence. This is a safety feature, not a sign that gas is leaking. That said, if you smell gas near the dryer at any time, turn off the gas supply, ventilate the area, and contact your gas utility provider before performing any diagnosis.

Resetting the dryer by unplugging it or cycling the power may temporarily clear the fault display, but the error will return as soon as the dryer attempts another heat cycle and the underlying problem has not been resolved. Because E4 involves a fault count from failed ignition attempts, the root cause in the ignition circuit must be diagnosed and corrected for the error to stay cleared.

Some causes of E4 are DIY-friendly, such as verifying the gas supply valve is open or checking the sensor wiring harness for loose connections. Replacing components like the radiant sensor or igniter is within reach for experienced DIYers comfortable working with gas appliances. However, any work involving the gas valve or gas line connections should be performed by a qualified technician if you are not confident in handling those components safely.

Repair costs depend on the failed component. A replacement radiant sensor typically costs between $10 and $30 for the part alone. An igniter usually runs between $20 and $60, and a gas valve coil kit generally falls in the $25 to $55 range. If you hire a technician, expect to add labor costs of roughly $80 to $150 depending on your area and the time required for diagnosis and repair.