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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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Jan 1, 2015
My old furnace had finally broken down for the last time when contacted twintech to have a new furnace installed They were prompt, knowledgeable and very reasonably priced. They did such a great job i tell all my friends and family about this company.
Jan 1, 2015
To whom it may concern, I recently had TwinTech (Greg and Grant Dainty) replace my furnace and service both my gas fireplaces and air conditioning unit. They were professional, courteous and very fair in their pricing. I would gladly recommend TwinTech to anyone needing work done. I can be contacted at 905-626-XXXX.
Jan 1, 2015
My Fiancé and I have relied on Twintech Heating and Cooling now for the better part of the last 10 years. In that time, Greg has installed a furnace, an air conditioner, and a heat-pump at our residence in Toronto. In each instance Greg and his team were a pleasure to deal with. They were courteous and professional throughout the whole process and the quality of their work is first rate. Our experiences have always been extremely positive and we have referred his services numerous times to our friends and family. Without hesitation, I would recommend Greg and TwinTech Heating and Cooling to anyone looking to service or replace their existing heat/AC equipment
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