Wax thermostats used in cars were notorious for failing closed (overheating
the engine) since the wax capsule would split and the wax escape. It was the
bi-metallic thermostats that failed safe.
I have no idea how this oil 'stat fails but would guess closed.
Nigel
----- Original Message -----
From: "Duncan McFadyean" <ami@mcfadyean.freeserve.co.uk>
Sent: Monday, January 23, 2006 11:15 PM
Subject: Re: Europa-List: Oil Thermostat
<ami@mcfadyean.freeserve.co.uk>
More often in the open position, AFAIK.
Cars with failed thermostats tend to run cold, rather than the reverse.
Duncan McF.
----- Original Message -----
From: "Mike Parkin" <mikenjulie.parkin@btopenworld.com>
Sent: Monday, January 23, 2006 9:53 PM
Subject: Re: Europa-List: Oil Thermostat
> <mikenjulie.parkin@btopenworld.com>
>
> Duncan,
>
> If the waxstat fails does it fail open, closed or in the position where it
> failed.
>
> regards,
>
> MP
>
>
> ----- Original Message -----
> From: "Duncan McFadyean" <ami@mcfadyean.freeserve.co.uk>
> To: <europa-list@matronics.com>
> Sent: Monday, January 23, 2006 9:43 PM
> Subject: Re: Europa-List: Oil Thermostat
>
>
>> <ami@mcfadyean.freeserve.co.uk>
>>
>> Yes they do (i.e. open very rapidly within a few degrees) around the
>> temperature that they are 'rated' for, and close less rapidly. If you try
>> it
>> in water you'll see what I mean; an element rated at 80 will be doing
>> next
>> to nothing at around 78, then be fully open by about 82.
>> Having to dig deep in memory for this one!
>> If the temperature at any time exceeds 140 C then the wax element is
>> permanently destroyed.
>>
>> Duncan McF.
>
>
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