Electrolux Washer Error Code E37

The E37 error code on an Electrolux washer indicates that the control board is detecting no pressure difference within the pressure sensing system. This system relies on an airtrap (also called an air dome or pressure chamber) connected to the drum, which feeds air pressure changes through a hose to a pressure sensor on the electronic board. When water enters the drum, the trapped air compresses and the sensor reads the resulting pressure differential to determine water level. If the airtrap is blocked with detergent residue, lint, or debris, the air column cannot transmit pressure changes accurately, and the sensor reads a flat signal with no variation.

The second possible cause involves what is described as an antiboil 2 sensing failure. In this context, the pressure sensor input voltage is stuck at either 0V or 5V continuously, rather than varying across its normal operating range. A voltage rail fixed at either extreme indicates the sensor circuit has failed to respond, which could mean the sensor itself is defective, the wiring harness has an open or short circuit, or the control board input has failed. This is distinct from a clogged airtrap because the signal does not fluctuate at all, rather than fluctuating with inaccurate values.

Diagnosis follows a logical sequence from the simplest mechanical cause to electronic component failure. The airtrap and its connecting hose should be inspected and cleaned first, as blockages are a frequent and straightforward cause. If cleaning or replacing the airtrap does not resolve the fault, the pressure sensor wiring and connector pins should be checked for continuity and proper voltage. If the wiring is intact, replacement of the electronic control board is the final corrective step.