Whirlpool Microwave Error Code ERR 3

ERR 3 means the microwave detected a key error where one of the control panel buttons was registered as continuously active for more than 60 seconds. This is outside normal operation, so the control board stops the microwave and displays the error code. The most common causes are a physically stuck button, moisture under the membrane touchpad, or a damaged keypad. The microwave will not operate normally until the underlying key fault is resolved.

Unplugging the microwave and restoring power may temporarily clear the display, but ERR 3 will return if the underlying cause, such as a stuck button or damaged touchpad, is not corrected. A reset does not repair a faulty key input circuit. If the code reappears immediately or shortly after a reset, the touchpad or its connections need to be inspected and serviced.

Repair costs vary depending on the faulty component. A replacement membrane touchpad or keypad assembly typically costs between $20 and $80 for the part alone, depending on the model. If professional labor is required, total repair costs including diagnosis and installation can range from $100 to $250. Control board replacement, if needed, is generally more expensive and may approach or exceed the cost of a replacement microwave in some cases.

In some cases, yes. Start by unplugging the microwave for a few minutes and then pressing each button firmly to try to free any stuck key. If moisture is suspected, allow the unit to dry completely in a well-ventilated area before restoring power. If the error returns after these steps, replacing the membrane touchpad is typically the next repair step, which is a task many experienced DIYers can perform. Control board replacement is more complex and may warrant a professional technician.

You should not attempt to use the microwave while ERR 3 is active. The error indicates an abnormal key input condition, and the control board has halted operation specifically to prevent unintended activation. Continuing to operate an appliance in this fault state could pose a risk of the microwave starting unexpectedly. Unplug the unit until the fault is properly diagnosed and repaired.