Error E7 on Midea Air Conditioner

What does error E7 mean and how to fix it on Midea air conditioners?

Just when you need that refreshing cool air the most, your air conditioner decides to act up and shows error code E7. Don’t worry—while it may sound serious, this code simply indicates a problem with the temperature sensors on the compressor or discharge pipe.

The compressor is the heart of your AC unit, and these sensors are like its early warning system. When they detect abnormal temperatures, they trigger this code to prevent further damage. The good news is that in many cases, you can fix it yourself before calling a technician. Let’s go over the possible causes:

• Faulty temperature sensors (either on the compressor or discharge pipe): These small components can degrade over time, especially due to constant exposure to heat and humidity changes.
• Another possible cause is an overheated compressor: This can happen when the outdoor unit is very dirty and blocks airflow, or when the outdoor fan malfunctions. It’s like your AC trying to breathe through a clogged mask—it just can’t cool down properly.
• Electrical issues can also be responsible: Frayed wires, corroded connectors, or faults on the control board may cause the sensors to send incorrect readings.

Step-by-step guide to fixing error E7

We’ve prepared a short list of solutions for this issue. If you follow them carefully, you’ll likely be able to fix your air conditioner yourself:

1. First, try a full system reset: Turn off the air conditioner using the remote control and unplug it from the power outlet. Leave it disconnected for at least 30 minutes to reset the AC’s system and fully discharge all internal electronic components. This simple step might fix the issue if it was a temporary system glitch.
2. Clean the outdoor unit thoroughly: With the unit unplugged, remove the cover from the outdoor unit and clear out any dust, leaves, or debris. You can use a pressure washer (hydrojet) to remove all dirt for a deep clean. Pay special attention to the fan and ventilation grills. A clean unit allows for better airflow, which helps keep the compressor at a safe temperature.
3. Check the temperature sensors of your air conditioner: Locate the sensors in the outdoor unit (usually near the compressor and discharge pipe). Disconnect them and use a multimeter to measure their resistance. Refer to the manufacturer’s manual for acceptable values. If the readings are far off, you’ll need to replace the sensors.
4. Inspect the wiring and connections: Trace the cables from the sensors to the control board and look for signs of damage such as frayed wires or corroded/sulfated connectors. Clean the terminals with isopropyl alcohol or electronic cleaner and a soft-bristle brush. Make sure all connections are secure.
5. Check the operation of the outdoor fan: Turn the unit back on and observe whether the outdoor fan spins correctly. If it spins slowly or not at all, this could be the cause of overheating. In that case, you’ll need to check the fan motor or its wiring. A proper maintenance may help free a jammed fan.
6. If the issue persists, consult a professional technician: If none of the above steps solve the issue, you may need professional help. It could be a more complex problem, such as low refrigerant or a faulty control board. In such cases, it’s best to contact a Midea-certified technician who can inspect your unit and provide an accurate diagnosis for repair.

Error code E7 is a sign that your AC needs attention, but it doesn’t necessarily mean an expensive repair. With a little patience and these basic checks, you can fix many of these problems yourself. Remember that regular maintenance (like cleaning the filters and outdoor unit) can prevent most of these errors. And if at any point you feel unsure, don’t hesitate to call a professional.