Bertazzoni 30-Inch Combi-Steam Oven Code rES: Water Tank Not Seated

What rES means

On Bertazzoni 30-inch combi-steam ovens such as the MAST30CSEX, PROF30CSEX, MASCS30X and PROCS30X, rES means the water tank has been removed or has not been inserted properly. Without the tank in place, the oven cannot make steam. Push the tank in until it seats firmly and the message clears. The word appears on the display in place of the usual cooking information, and steam functions stay unavailable until the tank is detected. Check the slot for stray drops of water before reseating the tank, because moisture can hide the contact.

Common causes of rES

A tank that was removed for filling and not put back
A tank pushed in only partway
Debris or water on the tank contacts
A tank sensor that does not detect the tank even when seated

✓ One safe check you can try

1. Pull the tank out and dry the slot and the tank connector. 2. Check the tank for cracks or loose parts. 3. Slide it back until it clicks into place. 4. Wait a few seconds for rES to clear. 5. If it stays, call us.

! Why to stop there

Forcing a misaligned tank can crack the plastic connector.
A sensor that fails to detect the tank is inside the housing and not reachable.
Running a steam program without proper tank contact is not possible, so the oven stays idle.

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 Steam Oven codes

CAL (blinking)Bertazzoni 30-Inch Combi-Steam Oven Code CAL (Blinking): Descaling Overdue, Oven Blocked DEP / EMPBertazzoni 30-Inch Combi-Steam Oven Code DEP or EMP: Tank Must Be Emptied Descale light (steady / flashing)Bertazzoni 30-Inch Combi-Steam Oven Descale Light: Steady Means Due, Flashing Means Overdue -L0-Bertazzoni 30-Inch Combi-Steam Oven Code -L0-: Water Tank Nearly Empty PUMPBertazzoni 30-Inch Combi-Steam Oven Code PUMP: Water Returning to the Tank SAFEBertazzoni 30-Inch Combi-Steam Oven Code SAFE: Child Lock Active VAPBertazzoni 30-Inch Combi-Steam Oven Code VAP: Steam Reduction Running

rESrES questions

Does rES mean the tank is broken?

Usually not. It means the oven does not see the tank in place. Reseat it firmly and the message clears in most cases. Check that the tank is dry underneath and that nothing is caught in the slot.

What if the tank is fully in and rES stays?

A wet or dirty connector, or a sensor that does not register the tank, may be the reason. Dry the slot first. If that fails, book a visit.

Can I still bake without the tank?

The tank is needed for the steam functions. For a dry cooking mode, check whether the oven accepts it with rES shown, and if not, seat the tank first.