Monogram Ovens F1 Error: Oven sensor fault
The F1 error on a Monogram wall oven signals a fault in the oven temperature sensor circuit or a failure of the electronic oven control board. The control cannot obtain a valid temperature reading and has shut down the heating elements as a safety measure.
~15%
DIY Fixable
From $200
Typical Repair Cost
1–3 hrs
Pro Repair Time
Quick Assessment
Answer to continue safely
Is it safe to keep using?
No. Do not use the wall oven when F1 is active. Without a functioning temperature sensor, the control board cannot regulate oven temperature safely, creating a risk of overheating.
Can I reset the code?
Yes. A 60-second circuit breaker reset will clear F1. If the code returns, a physical fault in the sensor, wiring, or control board requires repair before the oven is safe to use.
When to stop immediately?
Stop if you notice: You smell burning from inside the oven or behind the wall panel, The oven continues heating after you cancel the cooking function.
Symptoms You May Notice
Wall oven will not heat
The oven fails to produce heat after Bake or Broil is selected; F1 appears within seconds of starting a cooking function.
Oven shuts off during cooking
The oven cuts out unexpectedly in the middle of a baking or roasting cycle and displays F1, requiring a full reset before any function can be attempted again.
Temperature shown on display is inaccurate
The displayed oven temperature reads far lower or far higher than the actual cavity temperature measured by an independent thermometer.
Oven beeps and displays F1 at idle
The wall oven sounds an alarm and shows F1 while idle with no cooking function selected, indicating the sensor fault is persistent.
Possible Causes
Failed oven temperature sensor (RTD probe)
The RTD probe resistance has moved outside the expected range (approximately 1,080 ohms at room temperature), and the control cannot interpret the reading.
DIY PossibleOpen or shorted sensor wiring harness
The wiring harness connecting the sensor to the control board has a broken or shorted conductor, interrupting or distorting the sensor signal.
DIY PossibleElectronic oven control board failure
The EOC board is malfunctioning and cannot correctly process the sensor input, even when the sensor and wiring are intact.
Requires ProfessionalSafe Checks You Can Do
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1
Circuit Breaker Reset
Turn off the dedicated wall oven circuit at the breaker panel for 60 seconds. Restore power and attempt to start the oven. Observe whether F1 returns immediately or only after the oven has been operating for a few minutes.
An F1 that appears only after the oven warms up (versus appearing immediately at startup) can indicate a sensor whose resistance shifts with temperature — suggesting a sensor that is marginal rather than completely failed.
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2
Test Sensor Resistance
Disconnect the wall oven from power at the breaker. The oven temperature sensor is located inside the oven cavity, typically mounted on the rear wall with one or two screws. Pull the oven out far enough to disconnect the sensor from its harness plug (usually accessible through a small opening in the back of the cabinet or from inside the cavity). Measure resistance across the sensor terminals with a multimeter set to ohms. Expected reading: approximately 1,080 ohms at room temperature.
Wall oven sensor access varies by model. On some Monogram models the sensor plug is accessible from inside the oven cavity without pulling the unit from the wall.
Tools required -
3
Inspect Wiring for Damage
If the sensor tests good at 1,080 ohms, inspect the two-wire harness running from the sensor through the oven cavity wall. Look for sections of insulation that appear discolored, cracked, or melted, and check that both harness connectors are fully seated.
In wall ovens, the sensor wiring often passes through a ceramic insulation block at the oven wall — inspect this pass-through point carefully.
When to Call a Professional
Contact a qualified technician if:
- Sensor resistance tests normal at 1,080 ohms but F1 keeps returning
- Replacing the sensor did not clear the code
- The control board requires replacement — wall oven removal from the cabinet is typically required
Need Professional Help?
Find qualified technicians in your area for proper diagnostics and repair.
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