Kitchenaid KEBU2080SSS steam function not working well

[strikingmoose]

I am needing to fix a problem with a kitchenaid Kebu208SSS double wall oven with steam assist.

When running the steam function you can hear the steam pump come on but nothing is emitted from the port that the steam comes out of. The sound of the pump stays on for about 5 seconds then a fair amount of water pours out of the port that steam usually comes out of.

I am thinking there is hard water buildup somewhere inbetween where the water line enters the oven and the steam is ejected in the oven itself that causes backpressure that stops the flow of water from becoming steam then causes a deluge of water to come out instead of steam.

I can't find a repair manual specific to the line of KA oven that has steam function, only the KEBS208SSS manual is found on google drive. Any insight or a pointer towards where I can find the manual to help me get at it?

[scrapiron]

For water to be coming out of the steam nozzle, the steam boiler must be over-filling. I suspect either a bad fill valve or pressure switch. Perhaps the hose or fitting leading to the pressure switch is limed up or restricted and not allowing the pressure switch to sense the proper amount of water.
I couldn't find a service manual. The Tech Sheet should be behind the console, though.

[dab147315]

No service manual just a tech sheet.