Cove Dishwasher Error Code 200128

Error code 200128 means the dishwasher has detected a runaway heat condition in HTR1, the primary heater circuit. The heater is running beyond its expected temperature limits without shutting off as designed. The machine stops operation as a safety measure to prevent damage or hazard. Allowing the unit to cool fully and retesting is the recommended first step.

You should not continue running the dishwasher while this error is active. A runaway heat condition means the heater is not being controlled properly, which poses a risk of damage to internal components and potentially to the surrounding cabinetry or countertop. Let the unit cool completely and do not run a cycle until the fault has been diagnosed and resolved.

Repair costs depend on which component has failed. A temperature sensor replacement is typically a lower-cost repair, often in the range of $50 to $150 for parts and labor. A control board replacement is more involved and can range from $200 to $500 or more depending on parts availability and labor rates in your area. Getting a diagnostic service call from a qualified technician will help identify the specific failed component before committing to a repair.

A reset or cool-down period may clear the error temporarily if the cause was a one-time event such as a low water fill or a momentary sensor anomaly. However, if an underlying component like the HTR1 relay or temperature sensor has failed, the code will return once the unit is run again. A lasting fix requires identifying and correcting the root cause.

Start by powering off the unit and letting it cool fully, then retest. If the error returns, the most common causes are a welded HTR1 relay on the control board, a failed temperature sensor, or insufficient water fill. Inspect the temperature sensor for correct resistance readings and check that the dishwasher is filling with an adequate amount of water. If those components test correctly, the control board may need to be evaluated or replaced.