What OP means on your Frigidaire refrigerator (frigidaire op error)
A frigidaire op error on your Frigidaire refrigerator means a temperature sensor reads open — usually the fresh-food or freezer thermistor circuit is broken. On some models OP can also indicate a freezer door shown open, so if the door is actually shut, suspect the sensor or the door switch rather than the door itself. It is the mirror image of the SH shorted-sensor code.
Symptoms
Compare what your Frigidaire refrigerator is actually doing against the list below before you settle on a cause, because more than one fault can present this way. On the refrigerator the signs can turn up alone or in a group, sometimes creeping in gradually and sometimes the moment after an outage, a heavy cycle, or a fresh install.
- “OP” shows on the display
- Temperatures may read wrong or a compartment drifts warm or cold
- On some models OP appears when a door is reported open
- The code can appear cold, before any cooling demand
Common causes
What you are seeing on your Frigidaire refrigerator can trace back to more than one root cause, which is why the list starts with the most probable. Taking them in turn shows whether your refrigerator needs nothing more than a simple check or a proper repair with genuine Frigidaire parts.
- Open thermistor — a temperature sensor has gone open-circuit
- Broken sensor wire — a harness lead has failed
- Faulty door switch — the switch reports the door open when it is shut
- Control input fault — the main board cannot read the sensor
Troubleshooting steps you can try
Attempt the following on your Frigidaire refrigerator step by step before you call anyone out. Anything on the refrigerator that involves mains power, gas, a hot cavity, water, or a sealed component is where you should stop and bring in a qualified technician.
- Confirm the doors are fully closed and nothing is holding them ajar.
- Unplug the refrigerator for five minutes, then restore power.
- Note whether OP clears or returns, and whether it tracks a door being opened.
- If OP persists with the doors shut, the sensor, wiring, or door switch should be tested.
Parts a technician may replace
Subject to the diagnosis, a technician may test or renew the fresh-food or freezer thermistor, sensor wiring, door switch, and main control board on your Frigidaire refrigerator. The right component for the refrigerator is matched from the model and serial number, and genuine OEM parts come through trusted suppliers rather than generic substitutes, so the performance, safety, and long working life of the refrigerator stay intact. Establishing which part of the refrigerator has failed before ordering avoids replacing more of the appliance than the fault demands.
When to call a technician
OP needs a technician to measure the thermistor resistance and test the door switch, replacing the open sensor or switch as required. This condition is rated Medium severity on a refrigerator, so there is no emergency — but if OP keeps coming back after the checks above, a technician should confirm the cause on your refrigerator before any part is replaced. As an independent service with no affiliation to the manufacturer, we send experienced, skilled technicians to your refrigerator and fit genuine OEM parts from trusted parts suppliers, with the workmanship on the refrigerator covered by a 30-day labor warranty. When you book, have the model and serial number of your Frigidaire refrigerator ready so the correct part can be matched ahead of the visit and the OP condition resolved in as few trips as possible.
Related help and Frigidaire resources
If the OP condition keeps returning after these checks, book Frigidaire refrigerator repair, browse our refrigerator error-code guides and step-by-step repair guides, or schedule service in your area on our locations page. See also the related SH shorted-sensor code. If you need the manufacturer specifications for your refrigerator or want to confirm the model, they are at frigidaire.com.
