In order to lnow if this piece should be replaced, one needs to know whether it should be open or shut being cold ? Thanks
- 30 January 2011
I don't believe the above answer is correct. This part is actually a bi-metallic switch. It is 'normally closed' ie. short-circuit (zero ohms) at room temperature, and is open circuit above 78 degrees C.
I have just tested a brand new one, and that's how it worked.
It is NOT a temperature dependent resistor(thermistor), which is what you might assume. It is simply a temperature activated switch.
By Dave- Scotland
- 10 December 2011
Hi ornito, the thermostat will be open when below 78 degrees, and shut when higher than 78 degrees.
QPlease could you tell me what the resistance should be on a new thermostat?1 Answer
- 14 September 2011
At room temperature, it should be short circuit (zero ohms). It is actually a bi-metallic switch, which 'opens' at higher temps. - in this case nominally 78 deg. C. It goes open-circuit above that.
It is not a thermistor ( temperature dependent resistor), as you would think.
QHi Rory Are these electomechanical devices ie physical switch inside?1 Answer
Or am I confusing this with a thermistor that would be high resistance when cold, low when at working temp
- 30 March 2011
Hi Glosterboy, a thermostat is essentially a switch. This particular thermostat is a 78 degrees model. This means, when the ambient temperature reaches 78 degrees, the thermostat will switch on (or off, depending on what its default setting is), which will in turn cause the element to stop heating the water in the dishwasher.