Miele oven error code F20

What Miele publishes for it

On a Miele oven, the manufacturer publishes this for the steam oven/combi-steam oven is not getting hot. That sentence is Miele's own, read off its published support page for this condition rather than worked out from the outside. Everything below it — what the condition covers and what is worth doing first — is ours, written from what this equipment does in Miami kitchens.

What this block of conditions is about

One block covers the wall ovens, the combi-steam ovens, the speed ovens and the warming and vacuum-sealing drawers, because Miele builds them on one control family. The steam side adds a set of its own about water: the intake valve, the nozzle, the container and the conductivity of the water itself.

What it covers

What a published cause names is a circuit rather than a component, which is the single most useful thing to know before anybody orders a part. This one covers:

• All DG/DGC/DGM:
• The condition can occur, if, for example, a large quantity of frozen food is being cooked.
• If the temperature in the oven compartment does not increase by at least 35.6°F (2°C) within 5 minutes at the start of the heating-up phase, condition
• Appears on the display.
• DGC 4000 to DGC 6000, DG 1000 to DG 5000 (with integrated steam generator):
• The water container has not been fully inserted.
• DGC 4000 to DGC 6000, DG 1000 to DG 5000 (with integrated steam generator):
• The coupling seal on the water container is not sufficiently lubricated.
• The coupling seal on the water container must be lubricated with a small amount of the silicone grease included:
• If the water container is difficult to insert and remove after prolonged use, or can only be inserted and removed with a jolt
• Or if condition
• Is displayed
• Only use the silicone grease supplied.
• On no account must margarine, oil, or any other domestic grease or fat be used, as these can cause the coupling seal to swell.
• Rub a small amount of the silicone grease supplied onto the inside of the coupling seal. The sealing ring can be lubricated without actually taking it out.
• If the coupling seal becomes porous or brittle
• Or if an unusually large amount of water collects on the floor of the water container compartment
• For thorough and gentle cleaning of your steam oven, it is recommended to use the manufacturer's products which also care for your appliance at the same time.

Worth trying yourself, in this order

1. Turn the steam oven/combi-steam oven off and back on again, then restart the program.
2. Push the water container into the appliance until it engages.
3. Turn the steam oven/combi-steam oven off and back on again.
4. Push the water container into the appliance until it engages.
5. Turn the steam oven/combi-steam oven off and back on again.
6. Replace the coupling seal:

Then what

Most of the oven and steam-oven conditions on this make are genuinely an owner's job — twenty of the twenty-five Miele publishes — and most of them are about water or about something in the cavity rather than about electronics. If yours is a combi-steam oven, assume scale until proved otherwise: the water here is hard, descaling is the maintenance this appliance actually needs, and a machine that is descaled on schedule reports very little.

Miele publishes this one for the ovens, steam ovens and the drawers — that is ovens, steam ovens and drawers on this site. The full Miele archive has the other conditions, searchable, and on this make the same number appears on more than one machine roughly a third of the time, so the appliance above is part of the answer. We repair this equipment across Miami-Dade, Broward and Palm Beach.