Pitco Prob

What does Pitco Prob mean?

Prob on a Pitco Solstice controller means the temperature probe circuit is open — the probe is disconnected or a wire is broken. With no temperature signal, the controller cannot read the oil temperature, so it disables all functions and will not heat. This protects the fryer from running blind on temperature. It is the open-circuit counterpart to the Hi shorted-probe fault.

Symptoms

• Display reads Prob and the fryer will not heat.
• All cook and timer functions are disabled.
• Fault appears when a probe lead is disconnected or a wire breaks.
• Condition does not clear with a simple restart until the wiring is restored.

Common causes

• Temperature probe connector is unplugged or loose at the controller.
• Probe lead wire is broken, cut, or chafed open.
• Probe element has failed open internally.
• Corroded or oxidized probe terminals breaking continuity.

Diagnostic steps

1. 01

   Check the probe wiring connections

   Inspect and reseat the probe connector at the controller. Look for broken, pinched, or disconnected leads anywhere along the harness from the probe to the board.

2. 02

   Measure probe resistance

   Ohm the probe and compare against the Pitco resistance chart for the current temperature — for example, roughly 942 ohms at 350F. An open reading confirms a broken probe.

3. 03

   Replace the probe if open

   If the probe reads open circuit and the wiring is sound, fit the correct Pitco replacement probe and route the leads away from heat and pinch points.

4. 04

   Reset the controller

   Turn the control off then on to reset. With a sound probe and wiring, Prob clears and the controller reads oil temperature normally.

When to call a professional

Call a qualified Pitco technician if Prob persists after reseating the connector and the probe measures within the resistance chart, since that points to a controller input fault rather than the probe. Probe resistance verification against the temperature chart and board-level input diagnosis are best handled by a technician with Pitco service documentation to confirm the temperature loop reads correctly.