Monogram Dishwasher Error Code RINSE ONLY light flashing

The flashing RINSE ONLY light on a Monogram dishwasher indicates that the appliance detected a drain failure, meaning water is not emptying out of the tub as expected. The control system triggers this indicator when the drain cycle does not complete successfully. The cause is typically a blockage somewhere in the drain path, including the garbage disposal, air gap, or outlet hose.

You should not continue running the dishwasher while this error is active. Standing water left in the tub from a failed drain can become unsanitary and may lead to odors or residue buildup on dishes and interior surfaces. Running additional cycles without resolving the drain issue will not clear the fault and could place unnecessary strain on the drain pump.

If the fix involves clearing a clog from the garbage disposal, air gap, or outlet hose, there may be no parts cost at all, only the time to inspect and clean the components. If the internal filter needs cleaning, that is also a no-cost repair. If the drain pump has failed and needs replacement, you can expect parts and labor costs combined to fall somewhere in the range of $150 to $400 depending on your location and service provider.

Start by checking the garbage disposal for clogs and confirm the disposal's dishwasher drain knockout plug has been removed. Next, inspect the outlet hose under the sink for kinks or sharp bends and straighten them out. Also clean the air gap fitting at the sink if one is installed. If those steps do not resolve the issue, remove and clean the dishwasher's internal filter basket, and if drainage still fails, the drain pump may need to be tested or replaced.

A reset may temporarily clear the indicator, but if the underlying drain blockage has not been resolved, the error will return as soon as the unit attempts to drain again. The correct approach is to identify and clear the blockage first, then run a drain or normal cycle to confirm the unit empties properly before considering the issue resolved.