Error code · Professional Range

Monogram ZGP Range Code F3: Open oven sensor

Medium · inspection needed

Code: F3
Appliance: Professional Range
Brand: Monogram
Warranty: 30-day workmanship

What F3 means

Monogram ZGP professional gas ranges, such as the ZGP486ND and ZGP484NG, use F3 on the oven side to report an open oven temperature sensor. The control measures the sensor's resistance, and a reading above 2900 ohms means the circuit looks broken, since a healthy sensor reads about 1080 ohms at room temperature. The documentation describes this only as an open sensor. Monogram ZET wall ovens have an equivalent code of their own. The oven may not heat while the control cannot read its temperature.

Common causes of F3

Oven sensor open internally
Break or loose pin in the sensor lead or connector
Connector contact problem at the control
Control input not reading the sensor

✓ One safe check you can try

1. Let the range cool fully with the controls off. 2. Close the oven door and run a short bake at a moderate setting. 3. If F3 comes back, stop using that oven. 4. Call us and tell us the model number and what the oven was doing.

! Why to stop there

A high reading can come from the sensor, a broken lead or a loose connector, and the code alone cannot separate them
We measure the sensor cold and compare it with the expected value
We look at the control only after the wiring and sensor check out

Opening a panel yourself does not automatically cancel a manufacturer warranty, but it can cause accidental damage, and some manufacturers set their own service conditions. Check your warranty terms, or ask us, before deciding.

→Same appliance

Other Professional Range codes

CXMonogram ZGP Range Code CX: Communication error C1Monogram ZGP Range Code C1: Main relay board link C2Monogram ZGP Range Code C2: Upper temperature encoder C3Monogram ZGP Range Code C3: Upper mode encoder C4Monogram ZGP Range Code C4: Auxiliary relay board link C5Monogram ZGP Range Code C5: Lower temperature encoder C6Monogram ZGP Range Code C6: Lower mode encoder SFMonogram ZGP Range Code SF: Special features menu

F3F3 questions

What does the open sensor reading mean in plain terms?

The control sent a signal toward the oven sensor and got almost no path back. That is how a broken sensor or lead looks, so the oven cannot be trusted to hold temperature.

Is F3 the same on wall ovens?

Monogram ZET wall ovens have a matching code for the same open-sensor condition, but this page covers the ZGP range. We match the code to your exact model before testing.

Will cleaning the oven fix it?

No. Cleaning does not change the sensor's resistance. If the sensor lead is damaged or the connector is loose, only a repair will clear the code.

Book a visit

Still seeing F3?

A technician diagnoses it on site and gives you the price in writing before any work starts.

(713) 955-0955