Whirlpool Air Conditioner Error Code Er

The Er code on a Whirlpool air conditioner signals a communication failure between the unit's internal control boards. It is classified as a manufacturing-level error code, meaning it is generated when one board stops receiving expected data from another. The unit will not operate normally while this fault is active. Resolving it requires inspecting wiring connections and, if necessary, replacing a faulty control board.

No, you should not continue operating the unit while the Er code is active. A communication failure means the control system cannot coordinate properly between components, which could lead to improper operation or additional damage. Turn the unit off and investigate the cause before restarting it.

Repair costs vary depending on the root cause. If only a wiring connection needs to be reseated, the cost may be limited to a service call fee, typically in the range of $75 to $150. Replacing a control board generally adds parts costs ranging from $100 to $300 or more, depending on the board and model. Getting a diagnostic assessment from a technician is the best way to estimate total repair cost.

Some cases of the Er error are caused by loose wiring harness connections, which a knowledgeable DIYer can inspect and reseat after unplugging the unit. However, if the cause is a corroded wire or a failed control board, repair becomes more complex and may require a technician. Always disconnect power before opening the unit and inspecting internal components.

A hard reset by unplugging the unit for several minutes may clear the Er code if it was triggered by a temporary power fluctuation rather than a hardware fault. If the code returns after the reset, there is likely an underlying wiring or component issue that needs to be addressed. Repeated resets without fixing the root cause are not recommended.