Traulsen Refrigerator Error Code Sensor Failure Call Service

What does Traulsen Sensor Failure Call Service mean?

Sensor Failure Call Service appears when the Intela-Traul control stops receiving a valid reading from one of its sensors. The control reads each sensor continuously, and when one fails to report it sounds the audible alarm, which repeats in five minutes or in 24 hours depending on which sensor is involved. The text stays on until the sensor is replaced. The cabinet may keep cooling, but the control is working with less information, so defrost and alarm decisions can be off. A cabinet air sensor tells the control how cold the box is, a coil sensor helps manage defrost, and a discharge sensor watches the refrigeration side. Because the message stays until replacement, silencing the alarm does not remove it, and the sensor wiring or plug may be the real problem rather than the sensor itself.

Affected models and control systems

Traulsen R and A Series cabinets with an Intela-Traul control, such as the RHT232WUT.

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

• Sensor Failure Call Service on the display
• Audible alarm repeating every five minutes or every 24 hours
• Cabinet temperature drifting up or down
• Frost on the coil because defrost is not ending properly

Possible causes

Listed in Traulsen's documentation

• Cabinet air sensor
• Coil sensor
• Discharge sensor
• Wiring or plug between a sensor and the control

Other likely causes — what usually sits behind Sensor Failure Call Service on this control. A technician confirms which one it is before any part is replaced.

• A sensor lead pinched or cut where it passes through the cabinet wall
• A connector corroded by condensation or washdown water
• A sensor knocked out of its holder during cleaning

Safe checks before calling for service

How a technician diagnoses Sensor Failure Call Service

1. Identify which sensor is reporting no signal from the control's alarm timing and menu.
2. Inspect the sensor, its lead and its plug for damage or moisture.
3. Measure the sensor's resistance and compare it with a known good reading at the same temperature.
4. Check the connector and wiring back to the control.
5. Verify the cabinet is holding temperature on an independent thermometer.
6. Replace the failed sensor and confirm the message clears.

Technical reference

Document

R & A Series Owner Manual (Oct 2004), VII-a Alarm explanations

Edition

FORM NUMBER TR35743 REV. 10/06, P/N 375-60176-00 (the replacement copy is Rev 10/06, not Oct 2004; the title we cited says Oct 2004)

Models / control

Intela-Traul R & A

Section

VII. A - Alarm Explanations (INTELA-TRAUL), printed p. 9 (PDF p. 10)

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.