dead siemens oven

[blackbat]

Hi all,

I have a Siemens HB91554 double oven, maybe 8/9 years old.

The main oven lightbulb blew.

Tried removing it, the glass part of the bulb came off in my hand.

As we were just about to throw a dinner party I thought I'd carry on cooking and attempt to remove the metal screw part of the bulb the next day.

Turned the oven back on, big mistake.

Bit of a flash. Main oven now dead. No fan. No heat on any setting.

Obviously the bulb metal casing has shorted something.

Small top oven still works, clock still on. So power is reaching the appliance.

I have at least manged to remove the bulbs metal casing with a pair of long nosed pliers.

So my questions are:-

Is there a fuse for each oven, if so where?

If there's no fuse, any thoughts on what the fault might be and advice on how to diagnose?

Any websites you know that show user manuals? Any websites you know that specialise in cookers?

[blackbat]

Sorry - should have mentioned it's all electric.

[blackbat]

Just found alt.home.repair, probably a more suitable group although I'll keep an eye open in here too if anyone wants to reply.

[NT]

There isnt usually a fuse inside the oven. Most likely to go bang are the switch contacts. No point guesing though, get a multimeter and find out.

You shouldnt need any circuit diagram, theyre pretty simple. Power goes through an on/off switch, then through a thermostat and to the element. The interior light is takced on before the thermostat.

NT

[blackbat]

You mean the rotary switch contacts as in figure 2 here?

left hand side switch is the one which selects grill / fan oven / defrost etc. I suppose if the switch was burnt out it would explain why everything on the lower oven is dead.

I guess that means taking the oven out too. Heavy bugger.

[NT]

Yup

'fraid so. Once you find the bad switch (or whatever else its less likely to be), switch contacts can sometimes be fixed by filing the mating surfaces clean.

NT

[Matty F]

Have you had a look at the back of the oven? My oven of another brand has a row of fuses under a cover at the top rear, and a wiring diagram on the back.

[blackbat]

Not yet, just waiting for a clear couple of hours when I can get it out.

[blackbat]

Can't see me being that lucky :-)

[blackbat]

Spoke too soon. Just tried the oven again tonight and it came back to life.

Bit of a dodgy smell for 5 mins but seemed OK for a 1/2 hour test run. Maybe your theory of switches getting blackened is true here and they may have self-cleaned by turning them on and off a few times. Unlikely but can't think of any other reason it could have come back to life.

I'll keep an eye on it for a while. It leaves me a little uneasy leaving it the way it is; don't want any fire risks.