(Home) Orange warning light

Please could someone tell me what the orange warning light is that looks a bit like a bugalow (complete with chimney and about four windows!)I'm quite sure it has nothing to do with a bungalow,it is the third orange light on the right hand side-glow plugs-fuel filter/water drain-bungolow? I have an '89 Masterace surf,light is intermitent, coming on when accelerating at around 3000rpm. Thank you Jon.
Also how is the fuel gauge conected? yesterday after putting fuel in the needle dropped to empty-eventualy started working again,but I'm not sure I trust it any more. Thanks once again Jon. - (#1313) Jon W, 29 Oct 01

low water in expansion bottle. - (#1316) David Miller, 30 Oct 01