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Most Common AC Error Codes
Posted On: July 4, 2024
Air conditioners (AC) come with built-in error codes that help diagnose issues. Here's a list of some of the most common AC error codes and their meanings:
General AC Error Codes
- E1: Indoor unit temperature sensor error
- E2: Indoor unit coil temperature sensor error
- E3: Outdoor unit temperature sensor error
- E4: Outdoor unit coil temperature sensor error
- E5: Communication error between indoor and outdoor units
- E6: Compressor temperature sensor error
- E7: Outdoor fan motor error
- E8: Indoor fan motor error
- E9: Water-level alarm (for units with dehumidifiers)
- F0: Overload protection of compressor
Troubleshooting Tips
- Check the Manual: Always refer to the user manual for specific error codes related to your AC model.
- Reset the Unit: Sometimes a simple reset can clear minor glitches. Turn off the unit, wait for a few minutes, and turn it back on.
- Inspect Filters and Vents: Clogged filters and obstructed vents can cause various errors.
- Ensure Proper Power Supply: Verify that the AC unit is receiving the correct voltage and power.
- Call a Professional: For complex issues, it’s best to consult a certified technician.
Understanding these error codes can help you quickly diagnose and, in some cases, resolve issues with your AC unit.
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Aug 16, 2022
Very pleased with the installation of our new furnace and A/C unit. From quotation stage to the completion of the job Twintech was very professional.
Thank you for a job well done.
Aug 15, 2022
My old water heater quit on me. I called TwinTech. In less than 4 days, I had my new water heater installed and the old one taken away. The whole process was quick, easy, pleasant, and well done. This is the third time I've dealt with TwinTech and I've been satisfied each time.
Aug 14, 2022
I had them replace my furnace last year. When it came time for the air conditioner this year, I did not hesitate to call Twintech again. I will also have them perform regular maintenance on them.
Aug 13, 2022
We required a new HVAC replacement after running the old
system for 18 years.
Dave understood our requirements and gave us a quote that
covered all the necessary items.
Installation was fast and very tidy. Everything works as
it should. Our thanks to Greg, Mitch and others for their
excellent work. Recommend this family owned business to
anyone else, considering HVAC or other work.
Aug 12, 2022
I needed a new furnace and A/C to replace my 21 yr. old units, and went to the internet to view potential companies in May, I received 3 quotes,
and chose Twintech based on their salesman Dave who was very detailed and covered off everything on what Twintech was all about,
an extremely dedicated company with so many years of experience, and after reading the on line reviews I was sold on Twintech, who did not disappoint as the installation team were top notch with Greg leading,
I would highly recommend this company without any doubts, in my books they are first class all the way. Our new Amana furnace and A/C are working perfectly !
Aug 11, 2022
Flawless transaction. They did exactly what they promised, showed-up on time, cleaned-up, and were highly professional. Highly recommended.
Aug 10, 2022
Salesperson and 2 man installation team were all professional and
knew their stuff. All three were friendly and helpful, answering all
my questions. The quality of their work demonstrated their experience
and expertise in their field.
Aug 9, 2022
A dear late cousin of mine recommended this company and I have been happy with the service.
Aug 8, 2022
We are very pleased with the work done by Twintech. They were very professional from start to finish. Dave came to our home and gave us a very competitive quote for new high efficiency furnace and air conditioner. The installers were very courteous and professional. We would highly recommend them.
Aug 7, 2022
Great experience getting an old furnace replaced.
Sales Guy (Dave) was great - honest, responsive, and friendly.
The work itself was done quickly and we are very happy with the outcome, thank you! We recommend TwinTech!
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