Vulcan Powerhouse heating DSI light shows & heat stops until pressed, why?

i have my Vulcan Powerhouse 100 serviced every two years. The DSI light has come on once or twice but the heating didn't stop. just pressed the button. We have had this unit since 1998 and have been told by the technician that there are parts that may die and can't be replaced only solution is the replace furnace.
I would like to know what the star rating is or are they too inefficient to have one.

Baz
June 2014

The dsi light normally means the gas has gone out or there is some issue with it ( check the box thing outside to be sure the gas is on )

hmmm
June 2010

I have a Vulcan powerhouse HZ9041 which stops working from time to time, the fan is on but no heat. I don't know how to contact Vulcan for repair! Has anyone got an idea?

MLL
March 2010

I have the same problem. The LED indicator on the circuit board confirms gas supply problem. We are on mains gas. Would anyone have a suggestion?

Matt
November 2009

This happens to our unit when we run out/low on gas. (We are on LPG bottle gas). Maybe you have a gas supply problem.

Thommo
August 2008