Baxter OV500 oven Error Codes
Applies to: OV500 rotating rack ovens. Compiled and paraphrased from the Baxter OV500 Rotating Rack Oven Operator Manual with Advanced Electronic Oven Control, form 36806 Rev. D dated February 2022, covering OV500E1, OV500E2, OV500G1-EE and OV500G2-EE built after 23 March 2017. Baxter Mfg is a division of ITW FEG. Confirm against the manual for your model. Table last updated Aug 13, 2026.
How to read the codes
The OV500 signals faults in three ways and they are easy to confuse. Some are WORDS on the display such as SHdn and LOC OUT. Some are BEHAVIOUR with no code at all, where a flashing display or a particular beep pattern is the message. And on gas ovens there is a separate LED on the ignition module, read by counting flashes, which a technician checks through a hole in the control box cover. Note also that a rapid beep means something different on a Kosher-equipped oven than on a standard one.
The codes
| Code | Meaning | Likely causes | Operator-safe steps | Technician work |
|---|---|---|---|---|
| SHdn | The safety alarm has shut the oven down after the probe read 570 to 600F for ten seconds | Runaway heating: failed control, stuck contactor or gas valve, or a probe fault | Baxter's instruction is unambiguous and this is the one entry on this page to act on immediately: TURN OFF ALL POWER AND GAS TO THE OVEN, then call service. The oven stays in shutdown until the 120VAC supply is switched off | Multiple circuits may feed the oven; confirm all are isolated. Cycling the breakers restores normal operation only once the cavity is below 570F, which does not diagnose the cause |
| Both temperature displays flashing, no beep, during a timed bake | Temperature recovery alert: the oven is calling for heat and not achieving it | Heating system fault, failed ignition on gas, or an element or contactor failure on electric. The control raises this after 15 minutes of the gap persisting | Open the oven door and close it, which resets the heat control. If it does not begin heating, call service. This is the alert that appears BEFORE a bake is ruined rather than after | Ignition sequence on gas, element and contactor checks on electric, probe verification |
| Continuous beeping | Rack rotation alert | The rack is not rotating, commonly because a pan is protruding from the rack and fouling the cavity | Check the rack is turning and look for pans sticking out past the rack. Baxter warns in the loading procedure that pans extending beyond the rack can jam it during rotation, so this is usually a loading fault rather than a machine fault | Rack lift and rotation assembly, carrier set screws, drive motor |
| Rapid beeping, faster than the bake timer | On a Kosher-equipped oven, the cavity is at risk of falling below the approved temperature | Door left open, vent left on, or the burner not firing | Turn the VENT off if it is active and check the door. On a gas oven check the burner is firing; if not, briefly open and close the door to reset the temperature control | If temperature falls below 150F the control locks out and only authorised personnel can restart it |
| LOC OUT | Kosher lock-out: the oven fell below 150F and the control has disabled itself | Sustained temperature loss on an oven running in Kosher mode, which enforces a 200F minimum set point | The oven will not operate and cannot be reset locally. Contact your Baxter service office; Kosher restart requires authorised personnel | Restore heat, then arrange authorised restart to preserve Kosher approval |
| Display alternating between a temperature and COOL | Cool Down mode is active, which is not a fault | The COOL DOWN button was pressed, or a cool-down cycle is running | Close the oven door or press any button to return to normal operation. Worth knowing before calling anyone | No action |
| Circulation fan running with the oven switched off | The oven is in cooling mode | Cool-down was engaged, or the door was left open | Close the door to cancel cooling mode. If the door was not open, call service | Vent and door switch operation |
| Ignition module LED, 1 flash (gas) | Air flow fault | Blocked flue, hood exhaust pressure switch, or draft inducer pressure switch | Not an operator check; the LED is inside the control box | Baxter's PM procedure tests both the hood exhaust and draft inducer pressure switches by disconnecting the tubing with a flame established, which should extinguish the burner |
| Ignition module LED, 2 flashes (gas) | Flame fault with no call for heat | Flame sensed when none should be present, or a sensing fault | Not an operator check | Flame sensing circuit and gas valve integrity |
| Ignition module LED, 3 flashes (gas) | Ignition module lockout after three failed trials for ignition | No gas, closed shutoff valve, ignition fault, or a genuine safety lockout | Before calling: check the loading door is shut and the door switch actuated, turn the oven off and WAIT FIVE MINUTES, confirm both gas shutoff and gas valve are on, then turn it back on. Baxter specifies the five minute wait, and skipping it is why a restart often fails twice | Verify lockout behaviour deliberately: with gas off, the module should lock out after three trials |
| UPdt-FAIL-USb-Err | A firmware or recipe update from USB failed | No binary file found on the drive, or an unreadable file | Insert the correct USB drive, power the oven off, wait ten seconds, and power on | Confirm FIRMWARE.BIN or RECIPE.BIN is present in the drive root |
If this needs an oven technician
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Two questions worth reading before you ring anyone: what to do first when a code appears and how to tell whether it is yours to fix.
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Related: the PM checklist that prevents the most common codes outright, and the operator guides for symptom-first diagnosis.
Not sure this is the right make? The lookup by code shows every make that uses a given code, and flags the ones that mean different things depending on the machine in front of you.