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What do These AC Error Codes Mean?
Posted On: September 7, 2024
If your AC unit is displaying error codes, it's typically signaling an issue with the system that needs attention. The meaning of error codes can vary based on the brand and model of your AC, but here are some common AC error codes and what they usually mean:
1. E1, E2, E3, E4, E5
These codes often indicate sensor problems or communication errors within the system:
- E1: Communication error between the indoor and outdoor units.
- E2: Indoor temperature sensor issue.
- E3: Outdoor temperature sensor problem.
- E4: Defrost sensor malfunction.
- E5: Overload protection issue.
2. F0
Usually signals a refrigerant leak or low refrigerant levels.
3. F1
Problem with the evaporator temperature sensor.
4. F2
Issue with the condenser temperature sensor.
5. P1
Voltage fluctuation or abnormal power supply issue.
6. P2
High-temperature protection for the compressor or system is triggered.
7. P4
Indoor temperature sensor problem, similar to the "E2" error.
8. H3
Compressor overload protection error, which could mean the compressor is overheating.
9. L3
This could point to a fan motor issue, particularly in the outdoor unit.
10. DF
Indicates the system is in defrost mode, which is common in heat pump systems during colder weather.
11. CH34
Overheating or high-temperature warning, possibly signaling a serious problem that requires immediate attention.
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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
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Installation was fast and very tidy. Everything works as
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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
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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!
Aug 6, 2022
This review is late coming so my apologies to the amazing Twin Tech team! I contacted Dave at Twin Tech for a quote this past Feb (as I was collecting a few) and his recommendation was excellent. From the first meeting with Dave to the team installing the new furnace, not once did i feel uncomfortable . The team were extremely professional yet personable and clean and tidy. Decent companies still exist!
The new furnace just purrs and its just amazing the difference it has made!
(PS my sibling ended up getting a furnace from them as well)
Aug 5, 2022
The service was Twintech was excellent.
Dave our salesperson was easy to talk to and was professional. The unit recommended meets our needs and budget.
Greg and his team arrived on time for the installation and even got rid of the garbage the contractors left in our furnace.
Would definitely recommend Twintech.
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