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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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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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