Old Electric stove schematics

[MathWizard]

I have an old stove that I was asked to lookup and I can't find any info on, and I've never worked on a stove before. Anyone know of a site with old electric stove schematics, say around the 1980/1990's, when there was only a clock and the rest was electro-mechanical? So I could look at a few and then hopefully they are all basically the same ?

The stove has lights that don't always work, and seems related to what knobs are turned, or the thing is up to temperature, or something, I just heard about it. I think the elements are working. Maybe some one wired it up wrong in the past.

[james_s]

They are mostly about the same, it's not uncommon to find the schematic printed on the back or turned in behind the control panel, have you looked? By lights are you referring to the indicator lights that show when a burner is turned on or the oven is heating? If you post the model number that might help too.

[MathWizard]

It was the indicator lights, but also the clock would cut out sometimes, maybe there's some loose/bad connections too. It should have a cleaning and tune up. I don't remember the model, but next to nothing came up.

What I really need is schematics from the same era, so before all the digital stuff, with digital control of relays. Looking it up on google, and just going through some, it looks different than the schematics I'm used to for DC stuff.

[james_s]

I think it's reasonably likely that there's a schematic inside, or printed right on the back. There really isn't much to these things, especially the clock, that will be standalone, the mechanical ones have a synchronous motor that is just connected to the incoming power.

[amyk]

I'm not sure you even need a schematic for such a thing. It's just 4 independent heaters wired to the controls and incoming (240V) mains in parallel.

[floobydust]

The stove's make and model number are usually located on the back, or inside the oven door frame.
Without that info, you're not going to get far.
Neon indicator lamps malfunctioning, clock acting weird may be an open neutral connection.
When you use a smaller 120VAC element, it connects the open neutral.

You can just unplug the stove and use a multimeter to measure ohms across L1, L2, N with various things switched on or off.

[helius]

The "open neutral" is a real possibility. It can also affect an entire building: does the place where this stove is installed have issues with flickering lights or a buzzing refrigerator?

[MathWizard]

IDK the history of the stove, it's 2nd hand now, my Dad's looking at it, he should manage without the diagram. It can't be on the stove anymore, that's why he wanted 1.

Thanks I'll mention to check the neutral connections being bad.