Rivacold E1

What does Rivacold E1 mean?

E1 is a temperature-probe error on the controller fitted to the Rivacold unit — the sensor has failed open, shorted, or is reading out of range, so the controller has lost a valid reading for that probe. Which probe E1 names depends on the controller: on the Carel easy thermostats it is the SECOND (defrost) probe error, while other controller families report E1 as a probe 1 / S1 (cabinet) failure. Confirm the probe map for the controller actually fitted before swapping parts.

Symptoms

• Display shows E1 (the temperature value may be replaced by E1 / -- / a flashing fault)
• No room-temperature control; the compressor runs on a fixed duty cycle instead of by temperature
• Alarm relay/buzzer active

Common causes

• Failed or aged NTC cabinet probe
• Probe cable cut, pinched, or loose at the controller terminals
• Moisture or corrosion in the probe connector
• Probe reading outside the controller's valid range

Diagnostic steps

1. 01

   Confirm which probe E1 refers to

   Check the manual for the controller actually fitted (Carel / Eliwell / Dixell) to confirm E1 is the cabinet/room probe and which terminal it lands on.

2. 02

   Inspect the probe wiring

   Trace the probe lead from the controller to the sensor for cuts, pinches, or a loose terminal, and reseat the connector — wiring faults are the most common cause.

3. 03

   Measure the NTC resistance

   Disconnect the probe and measure its resistance, comparing against the controller's resistance-vs-temperature table for the probe type. An open or shorted reading means replace the probe.

4. 04

   Replace with the correct probe

   Fit the controller-spec NTC probe, route it away from heat and water, and confirm the controller's probe-type parameter matches.

When to call a professional

If new wiring and a new probe do not clear E1, the controller input may be damaged — have a refrigeration technician check the controller board and the probe-configuration parameters.