Error code · Microwave & Advantium

Monogram Advantium 120 Code F4: humidity sensor open or shorted

Medium · inspection needed

Code: F4
Appliance: Microwave & Advantium
Brand: Monogram
Warranty: 30-day workmanship

What F4 means

With Monogram Advantium 120V speedcook ovens, such as the ZSC1001, ZSC1201 and ZSC1202, F4 refers to the humidity sensor circuit, which the control uses to judge steam in the cavity during cooking. The control reads that circuit as either open or shorted. This follows the published code list for the same speedcook platform, so we state it plainly and not as a Monogram quotation. You will see F4 on the display, and sensor-based cooking may stop or be unavailable.

Common causes of F4

Humidity sensor circuit open or shorted
Loose sensor connector
Steam or grease on the sensor
Board input that interprets the humidity reading badly

✓ One safe check you can try

1. Let the oven cool and air out with the door open. 2. Wipe the cavity and door seal, taking care around vents. 3. Press cancel or off and try a basic timed function. 4. If F4 returns, call us before using sensor cooking again.

! Why to stop there

The code does not say whether the circuit is open or shorted, so we measure it to separate the sensor from the wiring.
Heavy grease or steam deposits can disturb the reading, which we inspect first.
We quote a written price before repairs, with a 30-day workmanship warranty.

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 Microwave & Advantium codes

Abnormal High TempMonogram Advantium 240 Code Abnormal High Temp: cavity hotter than the setting DEMO ModeMonogram Advantium 240 Mode DEMO: Showroom Setting Active Lower Thermal Sensor OPENMonogram Advantium 240 Code Lower Thermal Sensor OPEN: bottom sensor disconnected Lower Thermal Sensor SHORTEDMonogram Advantium 240 Code Lower Thermal Sensor SHORTED: bottom sensor shorting out Humidity Sensor OPENMonogram Advantium 240 Code Humidity Sensor OPEN: moisture sensor circuit broken F1Monogram Advantium 120 Code F1: cavity thermistor reads open F2Monogram Advantium 120 Code F2: thermistor in the cavity is shorted F3Monogram Advantium 120 Code F3: key panel circuit shorted

F4F4 questions

What is the humidity sensor for?

It senses steam during cooking so the oven can adjust. When its circuit reads open or shorted, the control shows F4.

Can I still heat food?

A basic timed function may work, but if F4 returns right away, stop and call us.

Is a part always needed?

No. We test the circuit and connector first, and you approve a written price before we proceed.

Book a visit

Still seeing F4?

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

(713) 955-0955