Coffee maker: Delonghi ESAM 5500, not producing steam for cappuccino. It makes coffee fine, i.e. pump works. Heating element tests at 53 ohms suggesting it is ok. What the problem likely to be and how can I confirm/test suspect part? Is there a technical service manual, I cannot find one online.
I can have a hot cup of coffee, machine grinds the beans normal espresso function is fine.
However there is a facility to generate steam and force that thru an attached milk jug, or just providing hot water from a water spout attached to the same point on the machine. The heating element that I did a resistance check on (53Ohms) I think is listed as a vaporiser or steaming Part (DEL7332212600).
Water can be pumped thru this spout when descaling the machine, which it does when in this mode.
if you press the button for hot water, the display states "heating up please wait"
Machine is 4 years old.
I found a test procedure on the internet, which allowed me to prove the SOV's both worked.
I found that both TCO's on the steam heating element were both in an open circuit condition, when I shorted the the TCO's the element heated up and steam/hot water could be dispensed. I've ordered some new TCO's (£5 each) which I will replace. I suspect you are right in your diagnosis of the board being at fault, I'll fit the new TCO's and see if they blow again, in which case I will order a new board and 2 new TCO's, (lead time on a board is over a month!)
Any further advice is welcome, I will rate after response, thanks again.