Federal Display Refrigerator Error Code E1: Defrost Probe Error
E1 on a Federal display refrigerator with a Carel control means the defrost probe on the evaporator coil has a signal that is interrupted or short-circuited. The wrench button mutes the alarm. Check the wires and quick disconnect, and call us if E1 stays.
High: without the defrost probe, defrost control can fail and the case can warm.
- Code
- E1
- Maker
- Federal Industries
- Equipment
- Display cases
- Applies to
- Federal SSRC/SSRVS/SSRPF Carel electronic control
What does Federal Industries error code E1 mean?
The defrost probe sits on the evaporator coil and tells the Carel control when the coil is cold enough to need defrosting and when it is clear. E1 has the same cause as E0, a signal that is interrupted or short-circuited. When it appears, an alarm sounds, the alarm indicator lights, and the codes flash on the display, sometimes several in turn. The wrench button mutes the alarm, and the codes clear automatically after the problem is fixed. The manual's remedy matches E0: secure the probe wires and quick disconnect, check the probe resistance against the table, wire per the diagram and replace the probe if needed. Because the probe sits on the coil, a defrost problem can follow, with frost building up on the coil when the control cannot tell when to defrost.
Affected models and control systems
Federal SSRC and ESSRC display refrigerators with a Carel control. The SSRPF and SSRVS use the same Carel error table.
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
- E1 flashes on the display
- An alarm sounds
- Frost builds up on the coil or the case warms
- Several codes may cycle on the display
Possible causes
Listed in Federal Industries's documentation
- Probe signal interrupted
- Probe signal short-circuited
Other likely causes — what usually sits behind error code E1 on this control. A technician confirms which one it is before any part is replaced.
- Ice or condensation at the probe connector on the evaporator side
- A probe lead rubbed against the coil fins
Safe checks before calling for service
- Press the wrench button to mute the alarm.
- Check the case temperature with a thermometer.
- Look for heavy frost on the evaporator, without scraping it.
- Write down the model and codes, and call us.
How a technician diagnoses error code E1
- Read the code and any others in the cycle.
- Check the defrost probe wires and quick disconnect.
- Measure the probe resistance against the probe table.
- Check for 0 ohm (insulation) or infinite (break).
- Inspect the lead along the coil.
- Replace the probe if other remedies fail.
- The probe is on the evaporator behind panels.
- Frost on the coil may need a proper defrost before testing.
- A meter and the probe table are needed to confirm the reading.
How error code E1 differs from similar codes
E1 is the defrost probe, while E0 is the air probe. Both are probe signal errors in the same table.
Technical reference
- Maker documentation
- Federal Industries owner support
- Edition
- E3091-3, Revised 9/20/24, REV. G
- Models / control
- Federal SSRC/SSRVS/SSRPF Carel electronic control
- Section
- Error codes, Table 1 - Error Codes and Resolutions (SSRC/ESSRC manual p. 21; SSRPF/SSRVS manual section 13.4.5, p. 28)
- 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 Federal Industries display case error codes
Is E1 the same as E0?
They have the same cause, a signal that is interrupted or short-circuited, but on different probes.
What happens to defrost?
The control cannot read the coil, so defrosting may not work as intended.
Can I defrost the coil myself?
Do not scrape it. A technician defrosts and tests safely.
Need help with Federal Industries error code E1?
A technician confirms the cause on site and gives you the price in writing before any work starts.