Fisher & Paykel ActiveSmart Refrigerator Code 7: Evaporator Sensor Open

What Code 7 means

On original E-series ActiveSmart refrigerators such as the E522BRXFDU, Code 7 means the evaporator (defrost) sensor resistance is outside the normal range, above 45K ohms. The control relies on this sensor to run defrost, so an open reading can disturb defrost timing. You may see frost, warmer temperatures, and the code on the LCD or as a beep pattern. Frost may build up on the coil.

Common causes of Code 7

Evaporator sensor disconnected or broken
Damaged sensor wire in the freezer rear
Loose sensor connection at the power module

✓ One safe check you can try

1. Unplug the refrigerator for five minutes and restart. 2. Look for heavy frost on the freezer back wall without scraping it. 3. Keep door openings short while you wait. 4. If Code 7 returns, call us before frost builds up. Avoid scraping at the frost.

! Why to stop there

The sensor sits on the evaporator behind the freezer back panel.
Defrost timing off for long can freeze up the whole cabinet.
We check the sensor connection first and quote the replacement in writing.

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.

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Other Refrigerator codes

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Code 7Code 7 questions

Is the evaporator sensor the same as the defrost sensor?

Yes. It is the sensor that tells the control the evaporator coil's temperature, so the control knows when defrost is needed and when it is done. Check it soon.

What does a high reading mean?

A resistance over 45K ohms means the circuit is effectively open, like a cut wire or an unplugged sensor. A reading like this usually shows up as a cut wire or an unplugged sensor.

Is it urgent?

Moderately. Without defrost control, frost can build and block airflow. We give a written price first and cover our work with a 30-day workmanship warranty. Timing matters here.