Pitco Commercial Fryer Error Code PROBE OP: Open Circuit
PROBE OP / OPEN on a Pitco Solstice computer control points to a temperature probe circuit problem. The service manual tests the probe and its wiring for continuity, which finds an open circuit. A technician should do this test.
High: the fryer cannot read oil temperature, so it cannot heat under control.
What does Pitco error code PROBE OP / OPEN mean?
The fryer's temperature probe is a sensor in the oil that tells the controller how hot the shortening is. The controller expects a steady reading from the probe circuit. If the circuit is broken, the controller can no longer read the oil temperature and shows PROBE OP / OPEN. The wording OP stands for open in the meaning the service manual tests: continuity through the probe and the wires and connectors between the probe and the controller. A break anywhere in that chain gives the same display, whether the probe itself failed, a wire is cut, or a connector has pulled loose. Because the controller cannot control heat without the temperature, this is a message to take seriously on a fryer full of hot oil. The matching short-circuit case appears on the same control as SYSTEM FAILURE.
Affected models and control systems
Pitco Solstice and Solstice Supreme SG/SSH series high-efficiency gas fryers. This page covers the computer control (manual p. 82).
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
- PROBE OP / OPEN on the display
- Fryer not heating or heating erratically
- Temperature reading missing
Possible causes
Likely causes — what usually sits behind error code PROBE OP / OPEN on this control. A technician confirms which one it is before any part is replaced.
- Probe element failed open
- Probe wire broken where it bends near the fryer wall
- Connector between the probe and controller loose or corroded
- Oil or heat damage to the probe cable
Safe checks before calling for service
- Turn the fryer off and let the oil cool.
- Check that the controller connector is firmly seated, with the fryer off and cool.
- Look for a damaged probe cable without pulling on it.
- Call us with the model and the display.
How a technician diagnoses error code PROBE OP / OPEN
- Read the display and confirm PROBE OP / OPEN.
- Test the probe for continuity and resistance.
- Test the wires and connectors between the probe and controller for continuity.
- Inspect for damaged or oil-soaked cables.
- Replace the probe or wiring and run a controlled heat-up.
- The probe is immersed in hot oil and the controller circuit is live.
- Continuity testing requires the fryer cool and isolated.
How error code PROBE OP / OPEN differs from similar codes
PROBE OP is the open-circuit probe message on the computer control; SYSTEM FAILURE is its short-circuit pair.
Technical reference
- Maker documentation
- Pitco owner support
- Edition
- L22-345 R0
- Models / control
- Computer control
- Section
- Computer Control (p. 82)
- 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 Pitco fryer error codes
What does PROBE OP mean?
The probe circuit is open, so the controller cannot read oil temperature.
Can I keep frying?
No. Without a reading the fryer cannot control the oil temperature safely.
Is it the probe or the wiring?
Either. The manual tests both with continuity checks.
Need help with Pitco error code PROBE OP / OPEN?
A technician confirms the cause on site and gives you the price in writing before any work starts.