Whirlpool Washer Error Code 4-5

The 4-5 code means the control has detected that the diverter disk in the sump area is missing or not properly installed. This round disk is located beneath the lower spray arm and related sump components. The washer displays this code to prevent running without proper water direction, which would result in poor performance. Checking and reinstalling the disk is the required first step.

It is not recommended to continue running the washer while the 4-5 error is active. The diverter disk plays a key role in directing water flow during the wash cycle, and operating without it in place can result in inadequate cleaning performance and potential stress on other components. Resolve the fault before resuming normal use.

If the disk is simply dislodged, the repair involves no parts cost and only requires your time to access and reseat the component. If the diverter disk needs to be replaced, the part itself typically costs in the range of $10 to $40 depending on the specific model. Adding professional labor for diagnosis and reassembly could bring the total to roughly $75 to $175.

Start by unplugging the washer or disconnecting power. Then remove the lower spray arm, turbo zone assembly, rear feed tube, and outlet cover to access the sump area. Check whether the round diverter disk is present and properly seated. If it is misaligned, reseat it correctly; if it is missing or damaged, replace it with the correct part.

A simple reset will not permanently clear the 4-5 error if the diverter disk is actually missing or improperly installed. The control will continue to detect the fault condition each time the machine runs. The error will only clear reliably once the diverter disk is confirmed to be present and correctly seated in the sump.