Where Thermador puts its steam ovens
Thermador sells steam in three places. The first is a 30 inch steam and convection wall oven. Its steam space holds 2.8 cubic feet and has 17 cooking modes. The second is a double unit with that steam oven over a regular convection oven. The third is inside the 48 and 60 inch Pro Grand ranges, beside the main oven. Thermador also sells speed ovens, which mix microwave and convection heat. This page covers all of those. For a standard built-in oven, read Thermador wall oven repair.
How the steam side works
A steam oven boils water and sends the vapor into the cooking space. A pump moves water from the tank to a small boiler. A heater in the boiler makes the steam. Sensors watch the water level and the heat. A drain path takes the leftover water away at the end. Each of those parts touches water on every use. That is why a steam oven needs more care than a dry one.
No steam, or weak steam
Hard water leaves scale, the same white crust you see in a kettle. Scale coats the boiler and narrows the water path. Steam gets weak, then stops. Thermador's care guide says regular descaling is needed for the oven to run right. The oven tells you when. Run the Descale program as soon as it asks. Use a descaler made for steam ovens and mix it as the label says.
If you have put it off for months, the program may not be enough. We then find one of these:
- A water pump that is seized with scale.
- A boiler heater that has burned out under its crust.
- A level sensor that is coated and reads wrong.
- A blocked line between the tank and the boiler.
Water in the wrong place
Some water in the bottom after cooking is normal. Wipe it out and leave the door open a while. A puddle on the floor is not normal. We check the tank seat, the door gasket and the drain. A tank that is not pushed fully home can drip. So can a gasket that has gone hard or torn. A tank message that stays on with a full tank points to the tank sensor.
Heat and control faults
The convection side fails like any electric oven. A heating element opens. The fan motor wears out and gets loud. The temperature sensor drifts and food cooks unevenly. The touch screen or knob panel can also stop taking commands. We test each part with a meter before we name it. A guess costs you money, so we do not guess.
Speed ovens are a different repair. A speed oven has no boiler. It cooks with microwaves plus hot moving air. If it heats but will not brown, the element or fan is suspect.
What to do before we come
Empty the tank, rinse it and fill it with fresh cold water. Seat it firmly. Run Descale if the oven has asked for it. Dry the cavity and the door seal. Write down any message on the screen. If the oven tripped a breaker, leave it off and tell us.
Price, hours and who shows up
Homeowners pay $79 for the diagnostic. Let us handle the steam oven repair and we cancel that $79. A firm price, labor and parts both counted, is yours ahead of the first screw. Same-day times are open for most calls. Book on our site or phone us 6 AM to 9 PM on any of the seven days. A+ is a family owned independent. Techs must clear a background check and hold both a license and insurance. Steam oven work is covered by a 30-day repair warranty.
A steam oven is worth fixing in nearly every case. It is built into the wall or the range, and the failed parts are small. We only suggest replacing when scale has ruined several parts at once on an old unit. Chicago and its suburbs are home turf for our Thermador steam oven work, and the Illinois page maps it. Techs are based in LA, Houston, Virginia and the District as well. See Thermador appliance repair and oven repair. If your tap water is hard, use filtered water in the tank. It slows the scale.