Anets Fryer Error Code PROBE OP OPEN: Probe Reading
PROBE OP OPEN on two lines, shown by an Anets AGP fryer with the computer control, means the controller is getting an incorrect reading from the temperature probe. The manual says to contact a qualified service technician, so leave the fryer off until the probe has been checked.
High: the oil temperature cannot be trusted, so the fryer should stay off until the probe is checked.
What does Anets error code PROBE OP OPEN mean?
The computer control reads the oil temperature through a probe and uses that number to run the burner. When the reading it receives is not one it can accept, it shows PROBE OP on the first line and OPEN on the second. The manual's table on page 31 describes the message only as an incorrect probe reading and tells the reader to contact a qualified service technician. It does not list causes. The wording on the display, with the word OPEN, suggests the controller may be seeing a break in the probe circuit, but the manual itself does not say that, so we treat it as a likely cause rather than a stated one. What is clear is that the control has lost a trustworthy oil temperature, and a gas fryer should not be left heating without one. Cooking on the unit while this message shows is not advised.
Affected models and control systems
Anets AGP series gas fryers (AGP55, AGP55T, AGP60, AGP60W and AGP75) with the computer control, where the manual shows the message as PROBE OP OPEN on two lines. The digital controller version of the probe message is Prob.
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 and OPEN show on the two display lines
- No oil temperature number is shown
- The fryer does not heat, or heats unevenly compared with its normal behavior
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 wire broken or pulled loose at its connector, so the circuit reads open
- Probe damaged by heat or a knock during cleaning
- Oil residue or moisture in the probe connection
Safe checks before calling for service
- Turn the fryer off and let the oil cool completely before touching anything near the vat.
- Look at the probe and its wire without pulling on it: check that it is in place, undamaged and not caked with oil.
- Turn the fryer on once with the oil at its normal level and see whether the message returns.
- If it returns, leave the fryer off and note whether PROBE OP OPEN appeared at once or after the fryer had been heating.
How a technician diagnoses error code PROBE OP OPEN
- Read the display and confirm which message shows, then ask whether anything was cleaned or moved around the vat.
- Inspect the probe, wire and connector for breaks, heat damage or contamination, power off.
- Measure probe resistance at the connector against its curve; an open circuit shows no reading at all.
- Check the harness back to the control board for a break or loose pin.
- Replace the probe or repair the harness only after the meter result, then compare the display with a thermometer on heat-up.
- Testing the probe circuit means disconnecting wiring beside hot oil and a gas burner, and an open wire can hide in a harness.
- A wrongly reading probe can let oil overheat, so the repair and the temperature check need to be done by a technician.
How error code PROBE OP OPEN differs from similar codes
PROBE OP OPEN is the computer control wording. The digital controller shows the same incorrect-probe-reading meaning as Prob.
Technical reference
- Document
- Anets AGP Series Installation & Operation Manual
- Edition
- 150-000007 Rev C (9/19)
- Models / control
- Anets AGP series gas fryers (AGP55, AGP55T, AGP60, AGP60W, AGP75) - computer control
- Section
- 6.7 Computer Control Display, p.31
- 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 Anets fryer error codes
Can I keep frying with PROBE OP OPEN showing?
We would not. The controller has lost a reliable oil temperature, and the manual says to contact a qualified service technician.
Does OPEN mean the wire is broken?
The manual only says incorrect probe reading. An open circuit is a likely cause, but a technician has to measure it.
Is it the same as SYSTEM FAILURE?
No. SYSTEM FAILURE means the manual reads the probe as shorted, while PROBE OP OPEN is listed as an incorrect reading.
Need help with Anets error code PROBE OP OPEN?
A technician confirms the cause on site and gives you the price in writing before any work starts.