VBM Domobar JNR - Pressure Problem

[jameslove]

Hello All,

My VBM Domobar JNR will occasionally build up very high levels of steam wand pressure.

It seems as if it is not being told that the steam pressure is correct.

Which part typically should i be looking at for replacement or cleaning.

Thankyou.

[Bames]

Pressure stat.

Control board if you're really unlucky, but that's not likely

[jameslove]

Pressure stat.

Control board if you're really unlucky, but that's not likely

Thankyou!

Parts should arrive today; I'll update once installed.

[jameslove]

Ended up being the contactor.

[Bames]

The contactor? What's that?

[noidle22]

Maybe element relay? Pressurestat contacts perhaps.

[jameslove]

Sorry I guess you would call it the micro switch?

[Javaphile]

A contactor is essentially a relay for higher power requirements, frequently with multiple shunts/contacts.

Contactor: A magnetically-operated device, for repeatedly establishing and interrupting an electrical power circuit. It is usually applied to devices controlling power above 5kW, whereas the term 'relay' is ordinarily employed below 5kW. The terms are often used interchangeably.

Here's the contacts/shunts from one that was in a commercial 2 group for 20 years: http://coffeesnobs.com.au/brewing-eq...tml#post279946


Java "Fun with electronics" phile