mypros+
Error code reference

Goodman Air Conditioner Error Code oP

Open Door Lockout (DS1 & DS2 open; wireless)

Goodman codesGoodman air conditioner codes

Open Door Lockout (DS1 & DS2 open; wireless) - unit will not condition space with door open.

First step from the service manual

Close Room Door.

The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

MyPros+ Max

Get the full diagnostic procedure for oP.

  • Step-by-step tests with expected resistance, voltage, and continuity values
  • Wiring diagram references and connector pinouts from the OEM service manual
  • Verified part numbers when replacement is required
Get the full procedure

$29/month · Cancel anytime · Or $9.95 3-day pass

What oP means on a Goodman air conditioner

The oP error code on a Goodman air conditioner indicates an Open Door Lockout condition. This code is triggered when both door sensors DS1 and DS2 simultaneously register an open state, communicating this status wirelessly to the unit's control board. When active, the system enters a lockout mode and will not perform any cooling or heating of the space. This is an intentional design behavior, not a system fault in the traditional sense. The unit is functioning as programmed by suspending operation to prevent conditioned air from being lost through an open doorway.

The door sensor circuit in this system relies on wireless communication between the door sensors (DS1 and DS2) and the main control board. Both sensors must register closed for the unit to operate normally. If either or both sensors fail to transmit a closed signal, the control board interprets the condition as an open door and enforces the lockout. This wireless dependency means the issue can stem from an actual open door, a sensor communication failure, low sensor battery power, or a sensor that has become misaligned or damaged.

Diagnosing this code begins with the simplest step: confirming the room door is physically closed. If the door is closed and the code persists, attention shifts to the wireless door sensors themselves. Technicians should inspect DS1 and DS2 for proper mounting alignment, battery condition, and signal transmission integrity. A sensor that is out of range, obstructed, or has a depleted battery can falsely report an open door state and sustain the lockout indefinitely.

Source: manufacturer service documentation.

Common causes of oP

  1. 01

    Room door is physically open

    Wiring / connection

    The most straightforward cause is that the room door is actually open. The system is designed to halt operation in this condition, so closing the door is always the first step.

  2. 02

    Low or dead battery in door sensor (DS1 or DS2)

    Part replacement

    Wireless door sensors rely on battery power to transmit their status. A weak or depleted battery can prevent the sensor from sending a closed signal, causing a false open-door lockout.

  3. 03

    Door sensor misalignment

    Wiring / connection

    If DS1 or DS2 has shifted from its mounted position, the sensor may not properly detect the closed state of the door. Inspect both sensors and their corresponding magnets or actuators for proper alignment.

  4. 04

    Wireless communication interference or out-of-range sensor

    Wiring / connection

    Wireless sensors that are obstructed or located at the edge of their transmission range may intermittently or consistently fail to communicate with the control board. Check for obstructions and proximity to the receiver.

  5. 05

    Faulty or damaged door sensor (DS1 or DS2)

    Part replacement

    If a sensor has been physically damaged or has internally failed, it will not transmit a valid closed signal regardless of door position. A replacement sensor would be required in this case.

See the test procedure for each cause

Frequently asked questions about oP

What does oP mean on a Goodman air_conditioner?
The oP code stands for Open Door Lockout. It means the unit has detected, via its wireless door sensors DS1 and DS2, that the room door is open and has suspended operation to prevent conditioned air from escaping. The unit will not cool or heat the space until the lockout condition is resolved. Closing the room door is the first step to clearing this code.
How do I fix the oP error on my Goodman air conditioner?
Start by closing the room door completely and waiting a moment to see if the code clears. If the door is already closed, inspect both wireless door sensors (DS1 and DS2) for alignment, physical damage, and battery condition. Replacing the batteries in either sensor is a quick and inexpensive step if the code persists with the door closed. If sensors appear damaged or continue to malfunction after battery replacement, sensor replacement may be necessary.
Is the oP error on a Goodman air conditioner a safety issue?
The oP lockout is not a safety hazard in the traditional sense. It is a designed operational behavior intended to improve energy efficiency by preventing the unit from running while the room door is open. No electrical fault or refrigerant issue is associated with this code. However, if the unit remains locked out due to a faulty sensor, it will not condition the space, which could be a comfort concern in extreme temperatures.
Will resetting the unit clear the oP error code?
A simple power reset is unlikely to permanently clear the oP code if the underlying condition, either an open door or a faulty sensor, is still present. The control board will re-evaluate the door sensor status on startup and re-enter lockout if it still receives an open signal. The root cause must be addressed first, either by closing the door or resolving the sensor issue, before the unit will resume normal operation.
How much does it cost to repair the oP error on a Goodman air conditioner?
If the fix is simply closing the room door, there is no cost involved. Battery replacement for the wireless sensors is typically a very low expense, usually in the range of a few dollars. If one or both door sensors (DS1 or DS2) need to be replaced, parts and labor costs can range from around $50 to $200 or more depending on local labor rates and parts availability. A technician diagnostic visit alone may range from $75 to $150 in most markets.

Related Goodman air conditioner codes

All Goodman air conditioner codes
View all 27 Goodman air conditioner codes

78,000+ service manuals · 160,000+ error codes · 55+ brands

Get Started

$29/month · Cancel anytime · Or $9.95 3-day pass