Hotpoint EW73P timer/stat fault?

[hakey]

Whilst staying at a friend’s house, I was asked to look at their neighbour’s faulty oven – a Hotpoint EW73P.

The main oven had stopped working, so they bought a new thermostat, which their son then fitted. This got the oven working, the only problem was that the thermostat was not switching the element off, causing the oven to overheat.

This is where I came in. I had a look to check that the thermofile was in the correct place and that the capillary tube wasn’t broken or badly bent. As it appeared ok I began to suspect that the ‘new’ stat might have been a duff one right from the start.

(The guy who they bought it off had wanted to do the job himself and had said something about being careful because they could easily damage the stat if they fitted it themselves. I know the fellow and he’s not the most ethical of traders and wouldn’t put it past him to sell a faulty part so that he could get a further labour charge to ‘sort out’ the problem later on. He also charged them £70 for the stat I know can be bought for £20 elsewhere.)

Anyway, I took the ‘new’ stat off, so that they could try and get a refund and refitted the old ‘faulty’ one (so that the whoever fitted the next stat would be able to see which wires went to which terminal). For some reason the faulty stat has had its capillary tube, thermofile and the sort of ‘nipple’ at the switch end removed, so there’s no way that it can sense temp or open the switch in the stat. Now, when the timer is set to manual and the oven dial is in the off position, the oven is on all of the time. When set to do a timed cook power is sent to the oven at the start of the cooking period and stopped at the end, leaving the auto light flashing; as soon as the maual button is pushed the oven – both fan and element – comes on again.

I’m wandering whether there has been a timer fault all along. The other possibility is that when their son fitted the stat he may have put the wires on incorrectly somehow, though I think he knows what he’s doing and would have swapped the wires one for one (he’s a tractor tech and is used to messing around with far more complicated wiring looms).

Anybody got any ideas? I’m on holiday and haven’t got my meter with me, though I’m sure that someone will have a neon screwdriver that I can borrow. Can anyone tell me which wires go to which terminals on the stat/switch – there are 3 terminals, A, B and C (though C looks like it may be 2 separate terminals.

Thanks.

Chris

[iadom]

Re: Hotpoint EW73P timer/stat fault?

Sorry, but I have to point you to this post. http://tinyurl.com/2o2hjk

PS. Main oven stat is around £10.00 + vat.

Your friend has obviously been ripped off. I would strongly advise getting a local independent engineer to have a look at this rather than pouring oil on troubled waters.

Jim.

[hakey]

Re: Hotpoint EW73P timer/stat fault?

I am an independent ex-engineer, just not that local – I live 45 miles away, but I do come up here regularly. This is a remote rural area and the local independent engineer is the guy that sold them the part, and yes I agree they have been ripped off ( I think I said as much in my OP). Like I say I know the guy and wouldn’t trust him.

Even if there were another trustworthy engineer in the area, the call out cost would probably be fairly high (on top of the £70 that they have already paid). If I had seen the oven before thay had started messing with it I would have told them to pay the Hotpoint call out, as it is less than 5 years old.

If anyone can give me an idea of how the stat terminals should be wired , that would be a great help.

Thanks

[hakey]

Not sure what the link is about iadom? it doesn’t work.

[iadom]

hakey wrote:Not sure what the link is about iadom? it doesn’t work.

Fixed.

[hakey]

Fair enough. I’ve got a fair idea of what’s going on anyway.

Unless I’m mistaken, the timer switches live to the stat. The faulty stat that I’ve put back on the cooker is now permanently closed circuit (I’m guessing that removing the capillary might have caused this). The stat that was supplied by the local engineer was proabaly faulty and I think that he knew it. The three terminals will be live in from the timer and a live to the fan and one to the element.

[Author]

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