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The tables below contain lists of error codes for several models of the Midea air conditioners. For each error code, there is a short explanation of the type of the malfunction. There are separate tables for the following series of Midea ACs: R series, 9V, 9A, and the Cassette / Ceiling&Floor series. If you're looking for information on AC Outdoor Units, you will also nd it below.


Midea air conditioner error code R series

CODE: E0.
RESULT: EEPROM parameter error.

CODE: E1.
RESULT: Indoor / outdoor units communication protection.

CODE: E2.
RESULT: Zero-crossing signal error.

CODE: E3.
RESULT: Fan speed out of control.

CODE: E5.
RESULT: Open or short circuit of outdoor temperature sensor.

CODE: E6.
RESULT: Open or short circuit of room or evaporator temperature sensor.

CODE: P0.
RESULT: IGBT over-strong current protection.

CODE: P1.
RESULT: Over voltage or too under voltage protection.

CODE: P2.
RESULT: Temperature protection of compressor top.

CODE: P4.
RESULT: Inverter compressor drive error.

Midea air conditioner error code 9V series

CODE: E0.
RESULT: EEPROM.

CODE: E1.
RESULT: Indoor / outdoor units communication protection.

CODE: E2.
RESULT: 3 Zero-crossing signal error.

CODE: E3.
RESULT: Indoor fan speed out of control.

CODE: E5.
RESULT: Outdoor unit temp. sensor or connector of temp. sensor is defective.

CODE: E6.
RESULT: Open or short circuit of room or evaporator temperature.

CODE: E7.
RESULT: Outdoor fan speed out of control.

CODE: P0.
RESULT: IBM malfunction or IGBT over-strong current protection.

CODE: P1.
RESULT: Over voltage or too under voltage protection.

CODE: P2.
RESULT: Temperature protection of compressor top.

CODE: P4.
RESULT: Compressor position protection.

CODE: P5.
RESULT: Inverter module protection.

Midea air conditioner error code 9A series

CODE: E0.
RESULT: EEPROM.

CODE: E1.
RESULT: Indoor / outdoor units communication protection.

CODE: E2.
RESULT: Zero-crossing signal error.

CODE: E3.
RESULT: Indoor fan speed out of control.

CODE: E5.
RESULT: Outdoor unit temp. sensor or connector of temp. sensor is defective.

CODE: E6.
RESULT: Open or short circuit of room or evaporator temperature.

CODE: E7.
RESULT: Outdoor fan speed out of control.

CODE: P0.
RESULT: IBM malfunction or IGBT over-strong current protection.

CODE: P1.
RESULT: Over voltage or too under voltage protection.

CODE: P2.
RESULT: Temperature protection of compressor top.

CODE: P4.
RESULT: Compressor position protection.

CODE: P5.
RESULT: Inverter module protection.

Midea AC Outdoor Units error code (except M5OA-36HRDN1-Q model)

CODE: E0.
RESULT: EEPROM error.

CODE: E1.
RESULT: No A Indoor unit coil outlet temp. sensor or connector of sensor is defective.

CODE: E2.
RESULT: No B Indoor unit coil outlet temp. sensor or connector of sensor is defective.

CODE: E3.
RESULT: No C Indoor unit coil outlet temp. sensor or connector of sensor is defective.

CODE: E6.
RESULT: No D Indoor unit coil outlet temp. sensor or connector of sensor is defective.

CODE: E4.
RESULT: Outdoor unit temp. sensor or connector of temp. sensor is defective.

CODE: E5.
RESULT: Compressor voltage protection.

CODE: E7.
RESULT: Communication malfunction between outdoor main chip and compressor control chip.

CODE: P0.
RESULT: Temperature protection of compressor discharge or compressor top. For M4OC-36HRDN1-Q,it only means compressor discharge temp.protection.

CODE: P1.
RESULT: High pressure protection(only for M4OC1-27HRDN1-Q, M4OC-36HRDN1-Q).

CODE: P2.
RESULT: Low pressure protection(only for M4OC1-27HRDN1-Q, M4OC-36HRDN1-Q).

CODE: P3.
RESULT: Compressor current protection.

CODE: P4.
RESULT: Inverter module protection.

CODE: P6.
RESULT: Condenser high-temperature protection.

Midea AC Outdoor Units error code For M5OA-36HRDN1-Q model

CODE: E0.
RESULT: EEPROM error.

CODE: E1.
RESULT: No A Indoor unit coil outlet temp. sensor or connector of sensor is defective.

CODE: E2.
RESULT: Communication malfunction between outdoor unit and indoor units.

CODE: E3.
RESULT: Communication malfunction between outdoor main chip and compressor control chip.

CODE: E4.
RESULT: Outdoor unit temp. sensor or connector of temp. sensor is defective.

CODE: E5.
RESULT: Compressor voltage protection.

CODE: E6.
RESULT: PFC module protection.

CODE: P0.
RESULT: Compressor top. temperature protection.

CODE: P1.
RESULT: High pressure protection.

CODE: P2.
RESULT: Low pressure protection.

CODE: P3.
RESULT: Compressor current protection.

CODE: P4.
RESULT: Compressor discharge high-temperature protection.

CODE: P5.
RESULT: Condenser high-temperature protection.

CODE: P6.
RESULT: Inverter module protection.

CODE: F1.
RESULT: No A Indoor unit coil outlet temp. sensor or connector of sensor is defective Midea air conditioner error codes.

CODE: F2.
RESULT: No B Indoor unit coil outlet temp. sensor or connector of sensor is defective.

CODE: F3.
RESULT: No C Indoor unit coil outlet temp. sensor or connector of sensor is defective.

CODE: F4.
RESULT: No D Indoor unit coil outlet temp. sensor or connector of sensor is defective.

CODE: F5.
RESULT: No E Indoor unit coil outlet temp. sensor or connector of sensor is defective.

Midea M2OC-18HRDN1-M air conditioner error code

CODE: EO.
RESULT: EEPROM parameter error.

CODE: E1.
RESULT: No 1 Indoor units pipe temp, sensor or connector of pipe temp, sensor is defective.

CODE: E2.
RESULT: No 2 Indoor units pipe temp, sensor or connector of pipe temp, sensor is defective.

CODE: E3.
RESULT: No 3 Indoor units pipe temp, sensor or connector of pipe temp, sensor is defective.

CODE: E6.
RESULT: No 4 Indoor units pipe temp, sensor or connector of pipe temp, sensor is defective.

CODE: E4.
RESULT: Open or short circuit of outdoor temperature sensor.

CODE: E5.
RESULT: Compressor volt protection.

CODE: E7.
RESULT: Communication error between outdoor IC and DSP.

CODE: PO.
RESULT: Temperature protection of compressor top.

CODE: P1.
RESULT: High pressure protection (just for 36K 1x4 units).

CODE: P2.
RESULT: Low pressure protection (just for 36K 1x4 units).

CODE: P3.
RESULT: Compressor current protection.

CODE: P4.
RESULT: Inverter module protection.

CODE: P5.
RESULT: Outdoor temp, too low protection.

CODE: P6.
RESULT: Condenser high-temperature protection.

CODE: P7.
RESULT: Compressor driving protection.

CODE: PF.
RESULT: PFC protection (just for 36K 1x4 units).

Midea MSX-07HRN1-QC2 air conditioner error code

CODE: E1.
RESULT: EEPROM error.

CODE: E2.
RESULT: Zero crossing detection error.

CODE: E3.
RESULT: Indoor fan speed has been out of control.

CODE: E4.
RESULT: Over current protection occurs 4 times.

CODE: E5.
RESULT: The T1 sensor is open circuit or short circuit.

CODE: E6.
RESULT: The T2 sensor is open circuit or short circuit.

CODE: E7.
RESULT: The T3 sensor is open circuit or short circuit.

CODE: E9.
RESULT: Indoor / outdoor units communication error.


See What Our Customers Are Saying:

by Harry in Toronto on Twintech Heating and Cooling

Ever since I turned on my furnace on Oct 2018 I hear a humming sound when the furnace fan kicks in. I called Adamson Air System who installed my furnace 7 years ago and couldn't figure it out the problem. I just wasted money to the guy who couldn't figure it out. I found Twin Tech via Amana / Goodman website. I checked the reviews from previous Twin Tech customers. I called Greg and was onsite on time this morning Sunday, Nov 25 2018. He figured it out what's wrong with the furnace and explained what the previous installer (adamson air system) did wrong when they installed it. His knowledgeable about his job. He recommend to replace the fun motor because the sound is not normal when it's running. Looking forward to see him again to replace the fan motor.

by Roger in Pickering on Twintech Heating and Cooling

Our house is over 22 years old and I had been researching furnaces and A/C brands for a while and thought it was time to take the plunge. After calling three different companies to come in and quote the job, this one won me over. From the first visit from Dave all the way to the end of the install by Greg, Grant, and Piotr, I was glad to have picked this company. Dave was very knowledgeable and really took the time to explain what kind of quality installation I was going to get as well as showing me some of their previous work and certificates.

I was also surprised at how quick the installation took and how nice everything looked afterward, I mean it's only a furnace right? They even re positioned the furnace so that I have easier access to my filter and humidistat, awesome! If you are looking for a company that cares about their customers and is proud about the quality of work they do, along with a great and competitive price, then stop right here because you found it.

by Louis in Pickering on Twintech Heating and Cooling

Once our AC Unit started to fail, I called our past Heating & Cooling provider for support. The response was we needed a new motor for our Furnace. It was time to check their Quote against the marketplace, I reached to other providers online. One of the owner of Twintech (Greg), called me and offered a preliminary Quote and recommendation online. The others needed to set an appointment and came to measure and spend 1 hour before offering a quote. Then I asked Twintech to come finalize their quote to make sure their recommendation was aligned and met our needs.

Twintech was professional throughout the process, easy to deal with (Web, Phone and in Person), price right and met their commitment. Their team expedited the process and installation, arranged for a energy assessment for available rebates and most importantly, delivered on their commitment and managed to do a few extras. They installed a New Furnace, AC unit and Nest thermostat in a day, remove all older units, left the house and outdoors clean and without any debris. Great to be able to support a Local Company, Neighbour and Professional team - Well Done Team Twintech !!!

by Elizabeth and John L from Scarborough on Twintech Heating and Cooling

In October 2018, I contacted Greg at Twintech to do a furnace cleaning. Greg discovered that my furnace, installed in 2006 by another company, had been installed incorrectly, leading to restricted air flow. The heat exchanger was also defective. As well, my furnace was too large for the size of my house.

In my opinion, the biggest concern most of us have as consumers is that we have no idea of the quality or knowledge and experience of the technicians any heating and cooling company will send into our homes. I could have avoided having my 2006 furnace installed improperly (leading to early replacement), had I known about Twintech then.

With Twintech you get it all. Because Twintech is a smaller company you can rest assured that the only technicians who will work in your home are Greg and his twin brother Grant who are co-owners and fully licensed and certified with over 30 years of experience in installing and servicing heating and cooling equipment. They are both friendly and personable and answer all your questions. Their workmanship is outstanding. We had a 2 stage, variable speed Goodman furnace installed. My wife and I noticed a difference in the heating and even temperature of our 2 storey home almost immediately. Our old furnace always heated too much on the main floor and too little upstairs. We are also impressed with how quiet the furnace is.

Twintech's office manager, David Gergley, is equally friendly and not only gave us a competitive quote to replace our furnace (we sought other quotes), but also went above and beyond my expectations when he made arrangements with an energy audit company so that we would be considered for a grant from Enbridge and IESO.

Needless to say, I give Twintech a 10 out of 10 and highly recommend them!

by James, Ajax on Twintech Heating and Cooling

Clean, Fast and Efficient Work. Between all the quotes I received Twintech was a few dollars less and offered the best warranty.

by garysumnec360, Whitby on Twintech Heating and Cooling

They did an excellent job. Everything was very well explained. At the end of the job everything was very well cleaned up.

by Glade, Pickering on Twintech Heating and Cooling

Twintech offered me a competitive price but more importantly great sales and installation service. They did everything with attention to detail and quality workmanship that is hard to find in this day and age. Dave who first game to visit me answered most of my questions and probed about my needs. For the technical/install questions he was unable to answer he quickly had Greg and Grant the owners answer for me. They did not cut corners on the installation or do anything to simply save time. They stayed into the early evening to complete the job and removed all my old components and even fixed up mistakes other workers ahd made in the past. I would highly recommend them and use them again if the need arises in the future. If you are looking for service or new equipment I would highly recommend Twintech be on your list of Heating companies to get a quote from and ask your questions to.

by Anne of Major Oaks in Pickering on Twintech Heating and Cooling

The company epitomizes high quality service: from the initial client interaction with Dave to the installation and follow up with the technical team. One of the key features I look for is the ability of a technical person to talk to and not talk down to the customer when responding to questions and I had quite a few, all of which were very professionally addressed. I was also quite impressed with the follow up service, promptness, the obvious competence of the team who left no stone un-turned to ensure I was a satisfied customer. Thank you guys.

by Aileen Johnson in Toronto on Twintech Heating and Cooling

All staff concerned were total professionals. Sales rep Dave was like having an old friend at your house. No up selling or pressure, just good honest facts and figures. The owners and assistant who installed our unit worked quietly, efficiently and left our home clean. We could not have been happier with the service and attention we were given. We are so happy a family member recommended Twintech. She said "don't call anyone else, just call them...they are amazing". And they were!!! Thank you guys for the great work!!! A. Johnson

by Lynsey from Toronto on Twintech Heating and Cooling

We are completing a large project adding an addition on to our house and couldn’t be more pleased with our decision to trust Twintech with our hvac work. They removed and replaced the furnace, installed a new A/C unit, swapped our tank water heater for a tankless unit, and completed ducting and new A/C lines through the addition. Without hesitation we would recommend Twintech to anyone.

See What Our Customers Are Saying:

by Robert Rogers on Twintech Heating and Cooling

Very pleased with the professional service that TwinTech Heating and Cooling provided in replacing my furnace. I got several quotes from different service providers. Their price was excellent and they explained the features very well. We are very glad we went with TwinTech and highly recommend their services.

by Robert Mizuno on Twintech Heating and Cooling

We were new homeowners in need of a second opinion. TwinTech Heating & Cooling were Amazing and professional. Very knowledgeable and great service all around. Recommend to anyone looking for honest and reliable services. Treated with respect and care. Thank you Greg, Mitch and Bob!

by Ruth on Twintech Heating and Cooling

TwinTech is an excellent and honest company! I called them for a second opinion after being told by another company that I needed to replace my furnace. Turns out this was not the case at all! I did not need a new furnace. TwinTech did not push to make an unnecessary sale and saved me from a huge expense. Bob and Mitch were extremely professional and above all honest! I definitely recommend TwinTech!

by Anna Chin on Twintech Heating and Cooling

Amazing experience with TwinTech Heating & Cooling! Their team was professional, knowledgeable, and efficient from start to finish. They installed my new furnace quickly and left everything spotless. The technicians took the time to explain everything and made sure I was comfortable with the system before they left. Great customer service and fair pricing. I highly recommend them for anyone needing HVAC services!

by Connor Agnew on Twintech Heating and Cooling

Great experience all around. Bob was sharp and easy to talk to, and Greg handled the installation perfectly. Would hire them again in a heartbeat.

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