Topics:

• How to descale a Convection Steam Oven (CSO)?
• Boiler scaled up—please descale message appears
• How often to descale a CSO?
• How long does descaling take?
  
• Can you cancel a descale cycle?
• What happens if you run a descale cycle without descale solution?
• Did not descale message appears

Answer:

Descaling the Wolf Convection Steam Oven

Lime deposits are a natural result of steam creation and will slowly build up inside of the unit's boiler and water lines. Depending on water hardness and usage, the unit should be descaled every 6-18 months to remove build-up. Descaling more frequently will not harm the unit.

Before Descaling:

• Durgol® is the only recommended descaling solution at this time. Other products and substances can cause permanent damage to the unit. For more information, including purchasing instructions, see Convection Steam Oven Descaling Solution.
• Descaling requires emptying and filling the water tank several times throughout the cycle. Plan to be present for the entire descaling cycle.
  • Descaling takes about 45 minutes if only one rinse cycle is needed. If the unit determines more rinse cycles are necessary, then the time needed will increase up to an additional 30 minutes.
  • For safety reasons, the descale program cannot be interrupted or stopped once it is started.
• Descaling does not clean the oven interior. Descaling removes mineral deposits from the mechanical parts of the unit. It is not necessary to remove racks or pans for descale cycle. See also, Convection Steam Oven Cleaning Information.
• The water tank must be emptied of any existing water before descaling. 

Descaling Instructions:

Note that Wolf suggests running the cleaning process immediately after the solution is put into the unit.

For Legacy models, refer to:

• Legacy Convection Steam Oven (Touch Control) Descaling Instructions
• Legacy Convection Steam Oven (Knob Control) Descaling Instructions

For current models:

1. Touch Steam Clean.
2. Touch Descale, then OK
3. Touch Start. "Add 1 pt (0.5 L) Descaler - and Touch Enter" appears on the display. 
4. Touch and remove the water tank from the unit.
   
5. Pour the entire Durgol® Swiss Steamer descaling solution into the tank. Do not dilute.
6. Install the tank and close the water tank door. The descaling process will begin automatically.
7. After approximately 30 minutes, the descaling process is complete and the rinsing process will begin. 
8. Remove the water tank, turn on the sink faucet, and pour the descaling solution down the drain.
9. Fill the water tank with warm tap water and install the tank. 
10. Depending on the level of soil in the rinse water, the oven determines whether additional rinse cycles are necessary. Follow instructions on the display. 
    • Rinse cycles vary in length from approximately 5 - 20 minutes, getting shorter as they repeat.
11. Once the rinse cycles are complete, remove, empty, and dry the water tank. Wipe all stainless steel surfaces. 

If the above steps do not resolve the issue, no troubleshooting advice is available. Contact Factory Certified Service to schedule an appointment for repair.

Frequently Asked Questions:

How long does descaling take?

• Descaling takes about 45 minutes if only one rinse cycle is needed.
  
  • If the unit determines more rinse cycles are necessary, then the time needed will increase.
    
  • Depending on the number of additional rinses, the descale process may last an additional 30 minutes.
  • It is not necessary to rinse the unit more than the descale program requests, but it can be done by starting another descale cycle.
• The amount of time required for the descale process may vary based on the amount of mineral buildup in the unit.

Can the CSO descale process be paused or canceled?

• For safety reasons, the descale program cannot be interrupted or stopped once it is started.
• "Descaling aborted" appears in the display if the unit is turned off in the middle of the descale cycle.
• Even if power is disconnected to the unit, Descale mode will restart and the full descale cycle will be run after power is restored.

What if I forgot to add descale solution?

• Running the descale cycle without descaling solution is harmless.
• If the descale cycle is started without descaling solution, the unit will continue to run the cycle as normal, but the unit will not be descaled. 

The unit display says "Did not descale." What do I do?

• If a substantial amount of scale has built up, the unit may require two descale cycles to remove all of it.
• Hard water and infrequent descaling can increase scale buildup.

How often do I need to descale?

• Wolf recommends descaling the appliance once per year, regardless of if the descale message has appeared or not.

Recommended Accessories:

Refer to the product Use and Care Guide for further information.