Goodman Air Conditioner Error Code HP

HP stands for Heat Sentinel on a Goodman air conditioner. It indicates that the wireless indoor air temperature sensor has detected a temperature above the configured U3 threshold. This is a monitoring alert, not a system fault. It will clear automatically when the indoor temperature drops below that threshold.

The HP code itself is a monitoring notification rather than a warning of imminent equipment failure or danger. It is alerting you that indoor temperatures have exceeded a set limit. If the space is occupied and temperatures are uncomfortably high, addressing airflow or system performance issues promptly is advisable for comfort and equipment longevity.

If the HP alert is tied to a genuine system issue such as low refrigerant or a dirty coil, repair costs can vary widely. A refrigerant recharge and leak repair typically ranges from $200 to $600 or more depending on the refrigerant type and the extent of the work. A professional coil cleaning service generally runs between $100 and $300. Replacing or cleaning an air filter is a low-cost step you can often handle yourself for under $30.

In most cases, no action is required. The Heat Sentinel alert is designed to disengage on its own once the room temperature falls back below the U3 limit. If the alert persists for an unusually long time, it is worth checking the air filter, verifying that vents are open, and confirming the system is running and cooling normally.

Resetting the unit may temporarily clear the display, but the Heat Sentinel will re-engage if the indoor temperature remains above the U3 threshold. The proper resolution is to allow the space to cool naturally or to address any underlying performance issues that are preventing adequate cooling.