What Steam Function Not Working means on your Asko microwave (asko microwave steam function not working)
Asko’s OCSM line adds a five-in-one steam function on top of microwave and convection, and that steam path shares the same generator and water-tank hardware described for standalone steam ovens. An asko microwave steam function not working means the microwave and convection functions may operate normally while the dedicated steam path fails, so the diagnosis follows the same pattern as a steam oven: confirm the tank and water supply first, then look at the generator itself.

Symptoms
The list below helps you separate this problem on your Asko microwave from other problems that can look almost identical. Your microwave might show just one of these signs or several at once, creeping in over several cycles or appearing suddenly after a power cut, a heavy load, a spill, or recent installation work.
- a steam or combi-steam function is selected but no visible steam appears through the door
- the water tank may show as recognized, or may show a not-recognized warning separately
- food that should show steam-cooked moisture comes out dry
- microwave-only and convection-only functions continue to work normally
- the cycle may run its full time with no steam ever produced
Common causes
A single set of symptoms on your Asko microwave can come from any of the causes below, listed with the common ones first. Eliminating them methodically separates the quick checks anyone can make on a microwave from the problems that need trained diagnosis and Asko parts.
- Water tank empty or not seated — worth ruling out before assuming a generator problem
- Steam generator element failed — the dedicated heating element that produces steam has stopped working
- Water inlet valve blocked — the valve feeding water into the generator is not opening
- Mineral scale buildup — insufficient descaling can restrict or block the steam path over time
Troubleshooting steps you can try
Work these checks on your Asko microwave in the given order first — you may not need a technician at all. Stop wherever you are unsure on the microwave, or where live electricity, gas, heat, water, or a sealed part is involved, and let a qualified professional carry on.
- Confirm the water tank is filled, clean, and correctly seated.
- Run a descaling cycle if it has been longer than recommended since the last one.
- Confirm microwave-only and convection-only functions still work, which isolates the problem to the steam path.
- Try a short steam-only cycle to see whether any steam appears at all.
- If steam still does not appear after confirming the tank and descaling, book a technician.
Parts a technician may replace
The parts list for this problem on your Asko microwave typically includes the steam generator, water tank sensor, and water inlet valve, any of which a technician might inspect, test, or replace. Genuine OEM or trusted-supplier parts are fitted to your microwave, identified from its model, serial, and Art. No., so the microwave keeps working reliably.
When to call a technician
A technician tests the steam generator element and water inlet valve, checks for scale buildup, and confirms water reaches the generator before replacing parts. This Medium-severity problem poses no immediate risk to your Asko microwave, but Steam Function Not Working recurring on the microwave after the checks above calls for a technician to confirm the cause before replacing anything. We repair your Asko microwave as an independent provider, not an arm of the manufacturer, using experienced technicians and genuine OEM or trusted-supplier parts, with a 30-day warranty on the labor we put into the microwave. Booking is quicker if you can read your Asko microwave’s model, serial, and Art. No. off the rating plate first — that lets us match the right part for the microwave up front and clear Steam Function Not Working without repeat visits.
Related help and Asko resources
If the checks above leave Steam Function Not Working unresolved on your Asko microwave, book Asko microwave repair, browse our microwave error-code guides, step through our step-by-step repair guides, schedule service whenever it suits, or find local help on our locations page. Full product details for your Asko microwave live on the manufacturer’s site at global.asko.com.