Despite its high-quality name and performance, puddles of dirty water can leave you questioning, “Why is my Thermador dishwasher not draining properly?” A clogged filter is often the cause. Regular cleanings can prevent blockages and facilitate drainage. The following tips simplify your Thermador dishwasher troubleshooting with the most common reasons and solutions for draining problems.
Thermador Dishwasher Not Draining Properly? This Could Be the Cause…
Blockages and clogs are the most likely reasons for a Thermador dishwasher not draining water. We’ll pinpoint the most likely locations and removal methods to resolve draining issues.
Obstructed Dishwasher Drain Hose
The drain hose allows dirty water to exit by connecting the dishwasher to the garbage disposal or sink drain. Obstructions are more likely to occur if the hose isn’t positioned properly. Check under the sink to make sure the hose has a high loop of 20-50 inches above the floor. If an obstruction does occur, it’s best removed by a dishwasher repair service or an experienced DIYer.
Follow these steps to unclog the drain hose when your Thermador dishwasher won’t drain:
- Turn off the dishwasher’s power and water supply.
- Disconnect the drain hose from the disposal or sink drain by loosening the clamp at the connection point.
- Drain any residual water into a shallow pan or bowl.
- Inspect the hose for clogs, removing any visible obstructions with a declogging tool or straightened hanger.
- Replace the hose and tighten the clamp.
- Restore the dishwasher’s power and water supply.
Thermador Dishwasher Filter Is Clogged
Most dishwashers have filters to screen out larger food particles that could otherwise clog the drain. However, over time, the filter itself can become clogged with these particles, hampering water from draining. Monthly cleanings can prevent clogs and ensure water drains properly.
Here’s how to clean a Thermador dishwasher drain filter:
- Remove the bottom rack to access the filter at the bottom of the dishwasher.
- Twist the filter counterclockwise and lift up to remove
- Remove the cylindrical filter from the mesh screen and rinse each component under running water.
- Reassemble the filter and screen and replace, twisting the filter clockwise to secure.
- Replace the bottom rack.
Thermador Dishwasher Drain Pump Blocked
Drain pump blockages usually occur from a large food particle or a collection of particles that collect over time. When the pump is blocked, it can’t effectively expel water, resulting in a Thermador dishwasher not draining properly. The clog must be removed to enable the pump to function.
To access a Thermador dishwasher drain pump, the bottom rack and filter must first be removed. You may also need to remove any standing water above the drain pump cover. Consult your Thermador dishwasher manual for instructions on how to take out the pump cover and remove any visible clogs.
Air Gap or Garbage Disposal Issue
If your dishwasher shares a drain with a garbage disposal, food particles in the disposal can block water from draining. Run the disposal before starting a wash cycle to eliminate any debris that could clog the drain. If your disposal was newly installed, make sure its drain tube plug was removed to enable water to flow freely.
Similarly, a clogged air gap can also be responsible for a Thermador dishwasher not draining water. When an air gap functions properly, the air inside prevents the dishwasher’s drain hose from suctioning dirty water back inside the dishwasher. If the air gap is blocked, you may notice dirty water inside the dishwasher after a wash cycle or in the kitchen sink. To clean the air gap and prevent blockages, take off the cover and remove any visible debris on a regular basis.
The technicians at Twin Appliances are experts in all Thermador appliances. We can provide a professional assessment of any concern or malfunction.