Haier Air Conditioner Error Code Power■ Timer■ Running★

This indicator combination signals a transmission abnormality between the indoor and outdoor units. The indoor unit is sending control signals but the outdoor unit does not receive them within 20 seconds. The system excludes the first 2 minutes after power-on from this check to allow startup to complete. Once the fault is detected, normal operation is suspended until the communication issue is resolved.

A power reset may temporarily clear the fault display, but if the underlying cause is not corrected the error will return once the 20-second communication timeout elapses again after startup. Resetting is useful for confirming whether the fault is intermittent or constant, but it is not a fix on its own. The root cause in the wiring or control boards must be addressed for the unit to operate normally.

If the fix involves only a wiring correction or tightening a loose terminal, the cost is primarily a service call fee, typically in the range of $75 to $150. If a control board needs to be replaced, the total cost including parts and labor generally falls between $200 and $600 depending on the specific board and labor rates in your area. Getting a diagnostic inspection first is the best way to understand what is needed before committing to a repair.

Start by inspecting the wiring between the indoor and outdoor units, checking for loose terminals, incorrect connections, or visible wire damage. Also look for large electrical appliances or equipment near the units that could be causing interference. If the wiring appears correct and no interference sources are found, the indoor or outdoor control board may need to be tested and possibly replaced.

When this fault is active, the system typically stops normal operation to protect itself, so the unit will not be cooling effectively. Attempting to force operation in this state is not recommended, as the outdoor unit is not receiving proper control signals. It is best to leave the system off until the communication fault is diagnosed and corrected.