I have a used NS oscar with Sirai pressurestat. It was working fine on the first day and the next morning I turned it on, the power light turned on as usual but the heating light didn't. And the water wouldn't heat up even after 20 minutes, no sign of heat at all.
This model doesn't seem like it has a safety thermostat. The boiler is the same as the one hereNuova simonelli oscar doesn't heat up
, except that mine was a Sirai pressurestat:
After did my researches and going through many threads, especially this:Oscar heater won't turn on after descale - HELP
I did 3 tests:
i) pressurestat: I jumped the two wires that go into Sirai, no gain.
ii) Heating element: I used a home-made continuity tester, alarm clock, wires and battery, to test for it. The circuit was closed. I did unplug the spade before testing it. By any chance would I miss a malfunction in heating element without exact resistance reading(don't have a multimeter here in my apartment)? In this test, I let the wires going into the pressurestat remain jumped. Is that right?
iii) Gicar box: I turn the machine upside down, took photo and jot down which cable goes to which slot, and disconnected the Gicar box. Nothing seems burnt on the outside. Is there any way to verify it is ok? Except that the heating light doesn't turn on and doesn't heat, everything else is normal. Pumps, boiler fills etc.
Any idea what else could go wrong? I appreciate your help very much!