Dishwasher Showing Error Codes

Common Causes

Fill and drain codes dominate, and both usually have mundane causes — a closed supply valve or clogged filter — before pointing at the valve or pump. Heating codes appear when the water never reaches temperature within its time limit. The most distinctive is the leak code: water has reached the base pan under the tub and a float there has tripped, which on most models also runs the drain pump continuously until the pan is dried out.

What Dishwasher Error Codes Really Mean

An error code marks the system that failed a check, not the exact broken part. A drain error means the water level did not drop within the allowed time — the cause may be a filter full of food, a kinked hose, a blocked garbage disposal port, or a genuinely dead drain pump. The code narrows the hunt to one subsystem; testing finds the part.

Leak errors deserve special attention. Dishwashers have a base pan under the tub with a small float: any water reaching that pan — from a loose clamp, a cracked sump, a failed seal — trips the float and locks the machine into a protective mode, typically with the drain pump running continuously. The machine is doing its job: it has caught a real leak before your floor did.

Heating errors surface when water fails to reach target temperature in time, pointing at the heating element or its temperature sensor. And when codes appear randomly or several different ones alternate, the wiring harness connections and control board move to the top of the suspect list.