True Refrigerator Error Code Ed: Defrost Ended by Time
Ed on a True cabinet with a Carel control means the last defrost ended because it reached its maximum time, not because the coil reached the target temperature. One occurrence after heavy frost can be normal. If it shows often, note how often and call us.
Low: a record of how defrost ended; the cabinet keeps cooling unless the pattern repeats.
- Code
- Ed
- Maker
- True
- Equipment
- Reach-in refrigerators
- Applies to
- Carel control
What does True error code Ed mean?
Ed is a record of how the last defrost ended. A defrost normally ends when the coil probe says the evaporator is warm enough. If that never happens, the control stops the defrost anyway when its maximum time runs out, and shows Ed so you know. Once in a while that is expected, such as after a door was left open and a heavy layer of frost formed. If Ed shows often, the defrost may not be getting the coil warm enough, which points to a defrost heater, a coil probe, or an airflow problem that leaves ice behind and lets the cabinet warm slowly. The code does not stop the cabinet, so it is easy to overlook until frost covers the back wall. A technician looks at the heater, the probe position and reading, and the defrost settings.
Affected models and control systems
True cabinets with a Carel control.
Code numbers and their meaning can change between control generations. We match the full model and control before acting on a code.
What you may notice
- Ed on the display after a defrost
- Frost remaining on the back wall
- Cabinet warming slowly over days
- Water or ice pooling in the drain pan area
Possible causes
Listed in True's documentation
- Defrost heater or its connection
- Coil probe position or reading
- Heavy frost from a door left open or humid air
- Defrost settings
Other likely causes — what usually sits behind error code Ed on this control. A technician confirms which one it is before any part is replaced.
- A heater element that has weakened and no longer melts the full coil
- A coil probe loosened from the fins so it reads cool air
- A drain frozen partly shut so melt water refreezes
Safe checks before calling for service
- Check that the door is closing fully.
- Look for frost on the back wall without touching the coil.
- Check temperature with a thermometer.
- If Ed returns often, note how often the code appears.
- Tell us how much frost you see.
How a technician diagnoses error code Ed
- Read the code and note how often it appears.
- Inspect the evaporator for frost pattern.
- Test the defrost heater resistance and wiring.
- Check the coil probe position and resistance.
- Review defrost interval, duration and maximum time.
- Verify the drain is clear.
- Defrost heaters operate at line voltage in the evaporator housing.
- Scraping ice can puncture the coil.
- Defrost timing is a control setting tied to the cabinet's data.
Technical reference
- Document
- Commercial Refrigeration General Control Guide TEC_TM_001 Rev C, Carel p.75 Display Code Definitions
- Edition
- TEC_TM_001 | REV. C | EN, 09/3/2025, P#811072
- Models / control
- Carel control
- Section
- Electronic Control (with Display) - Display Code Definitions: Carel p. 74, Danfoss ERC/ETC p. 87, Dixell p. 96, LAE p. 110
- Checked
- October 2026
We use the maker's document to read the code and do not reproduce it. Always confirm the complete model and control before applying these steps.
Related True reach-in refrigerator error codes
Is Ed a problem?
Once in a while, no. It simply says the defrost ended by time. Frequent Ed suggests the coil is not warming enough.
Will the cabinet stop cooling?
Not by itself, but frost left behind can slowly reduce airflow.
Should I scrape the ice?
No. Tools can damage the coil, so leave frost to a technician.
Need help with True error code Ed?
A technician confirms the cause on site and gives you the price in writing before any work starts.