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Thanks for that info Tony, makes perfect sense.
Ok, that seems to suggest that the evaporator has probably gone very slightly leaky so efficiency would reduce over time, maybe has been reducing for a while. If it is a known effect it surprises me that the rear cavity containing the evaporator should be made without something built in to allow any escaping gas to vent without letting moisture inwards. Granted, that could reduce its insulating properties a tad but that should be minimal. It also seems surprising to me, (the layman), that the fridge interior should buckle inwards and not the insulation outwards. It must be pretty tough stuff though I had imagined it would be almost just an expanded foam, or there may be a strong protective cover over it of course.
Oh darn! Not what I wanted to hear but thanks Dave. Good to have it confirmed by someone who knows. Is there anything which I might have done which leads to this?
I’ll just have to start looking – – – and stretching my wallet. 🙁
Re: Suspect fan oven stirrup thermostat faulty.
Thanks for the heads up Bazza. After your warning I’ve rechecked, and the component I was looking at does seem to be some sort of a fan switch. It was open circuit when I first looked at it but somehow has now become short circuit and the upper cylindrical fan which cools the control cavity is running permanently even when the oven is stone cold. There’s one replacement needed at least! Probably my clumsy handling although I will say the alloy fingers holding the back on don’t look too secure or strong.
I’m having trouble locating the fan thermostat. Most sources online seem to call it Stirrup Thermostat Set, then they describe the basic operation of the main thermostat, as in “If your oven is not heating up to temperature…”
This is going to sound really silly but I’ve just stripped the light for cleaning while its easy to access, (I have had it stick like glue before). I found the bulb had disintegrated into a brass base, glass bulb with nothing left in it, and a pile of ceramic powder! I wonder if it is possible that this has blown on switch on as they normally do, and taken out the fuse after causing a surge giving the flash in the control cavity. I have read somewhere that these bulbs are fused in themselves but I don’t really get that for a bulb.
Re: Suspect fan oven stirrup thermostat faulty.
Yes, it was new to me too and didn’t make any sense. Then I thought to myself, “these fixit guys are known to be extremely clever and no doubt have their own language to describe these things”. Now you’ve burst my bubble!
I found it was called that on Zanussi’s spares site after I whittled my way down to the cut-out. I have heard these are one-shot devices. Is there a danger that I buy a new one, fit it, and then find it blows the first time I run the oven up if there is an underlying fault? If it’s only a series switch actuated by the temperature I wouldn’t have thought that would be an issue.
Don’t like the sound of the “selector switch contacts fried” suggestion. That sounded expensive!
EDIT: I would also ask, is it a non-starter to think of shorting out the thermal cut-out (won’t call it a stirrup thermostat, it might get a shocked response) TEMPORARILY FOR TESTING ONLY to see if there are any other faults to deal with?
Re: Zanussi ZOB551X oven, low and high grill action
Guess not then. For the benefit of others who may end up needing this info…
A lucky chance pointed me at more info on grills on this site, (http://www.ukwhitegoods.co.uk/help/fix- … ement.html), and it appears that I have an “Infra-red/Non-infra-red” setup. The inner element glowing and the outer not glowing seems to be correct at least in other comparable units. That one is solved then. I now appear to have a spare grill element!
I have also sourced the service wiring diagrams for the oven and it also turns out that neutral switching in a unit like this is not uncommon. Guess I found the answer to both my own questions. Thanks.
