I have an ancient Sharp R-8310 microwave/convection oven that recently
broke its temperature sensing thermistor for the convection part. I'd
like to keep this oven because of its simple mechanical controls, but
what kind of substitute thermistor will work (temperature @ 25C,
temperature coefficient)? The factory part (FH-Z0017WRK0) is $40 with
the thermistor in a plastic shell and attached to a cable.

wrote in message
oups.com...
I have an ancient Sharp R-8310 microwave/convection oven that recently
broke its temperature sensing thermistor for the convection part. I'd
like to keep this oven because of its simple mechanical controls, but
what kind of substitute thermistor will work (temperature @ 25C,
temperature coefficient)? The factory part (FH-Z0017WRK0) is $40 with
the thermistor in a plastic shell and attached to a cable.


$40 sounds pretty decent to me, it's surprising the part is still available
at all. If it were me I'd just buy the factory part and save the
substitution for impossible to find or horrendously expensive parts.

wrote:
: I have an ancient Sharp R-8310 microwave/convection oven that recently
: broke its temperature sensing thermistor for the convection part. I'd
: like to keep this oven because of its simple mechanical controls, but
: what kind of substitute thermistor will work (temperature @ 25C,
: temperature coefficient)? The factory part (FH-Z0017WRK0) is $40 with
: the thermistor in a plastic shell and attached to a cable.

I just had to replace that part and it cost $40 in Australia. I also
like the Sharp. IMHO, it's well worth it to fix it.

"James Sweet" writes:

wrote in message
oups.com...
I have an ancient Sharp R-8310 microwave/convection oven that recently
broke its temperature sensing thermistor for the convection part. I'd
like to keep this oven because of its simple mechanical controls, but
what kind of substitute thermistor will work (temperature @ 25C,
temperature coefficient)? The factory part (FH-Z0017WRK0) is $40 with
the thermistor in a plastic shell and attached to a cable.


$40 sounds pretty decent to me, it's surprising the part is still available
at all. If it were me I'd just buy the factory part and save the
substitution for impossible to find or horrendously expensive parts.

Of course, there are a variety of standard thermistors that go for more
along the lines of $1 from an electronics distributor.

Does anyone know what the specs on this are?

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Of course, there are a variety of standard thermistors that go for more
along the lines of $1 from an electronics distributor.

Does anyone know what the specs on this are?



Is it not in some special housing? I was envisioning a probe for sticking
into meat, perhaps this is just a cavity temperature sensor.

James Sweet wrote:

Is it not in some special housing? I was envisioning a probe for sticking
into meat, perhaps this is just a cavity temperature sensor.

It is the cavity temperature sensor and looks like a common glass
diode, but it's housed in a small plastic shell with spade lugs on it.

"James Sweet" writes:


Of course, there are a variety of standard thermistors that go for more
along the lines of $1 from an electronics distributor.

Does anyone know what the specs on this are?

Is it not in some special housing? I was envisioning a probe for sticking
into meat, perhaps this is just a cavity temperature sensor.

I'm not sure about that model, but the one I replaced a few years ago
was just soldered (or maybe spot welded) between two posts out in the open.

--- sam | Sci.Electronics.Repair FAQ: http://www.repairfaq.org/
Repair | Main Table of Contents: http://www.repairfaq.org/REPAIR/
+Lasers | Sam's Laser FAQ: http://www.repairfaq.org/sam/lasersam.htm
| Mirror Sites: http://www.repairfaq.org/REPAIR/F_mirror.html

Important: Anything sent to the email address in the message header above is
ignored unless my full name AND either lasers or electronics is included in the
subject line. Or, you can contact me via the Feedback Form in the FAQs.