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dual wall mount oven with f2 code  Rate Topic 
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 Posted: Thu Mar 31st, 2005 01:25 am
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Jedi Appliance Guy



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   The force is telling my your cooling fan is not working properly.  Turn off the breaker.  open the console.  Look at the fan,  try to turn it with your finger.

   Sometimes the fan blade will slide up the shaft and hit the screen and stop spinning.  Does the screen have fine mesh? if so, is it dirty? 

   Read the tech sheet taped to the left wall.  Find and bypass your "fan thermal switch".  Then turn the breaker back on. Does the fan run when you do that? 

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 Posted: Thu Mar 31st, 2005 03:02 am
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Samurai Appliance Repair Man
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Do like the Jedi says. If you need further information, click here.



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 Posted: Thu Mar 31st, 2005 08:20 am
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The Seven
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It appears that some ovens with ERC (electronic range control) will most likely to have some problems after self-clean cycle. These ovens use mainly oven temperature sensors.

Some of the following information from some web-sites could give us some insight "why":

(1) The temperature of the oven is very high (about 850 deg F (450 deg C)) during the self-clean cycle.

(2) The operating temperature range for NTC thermistors is from -100°C to + 300°C.

(3) Metal RTD's (Resistance Thermometer Device) offer a wide temperature range from -260°C to +850°C. But Metal RTD's are more fragile than NTC thermistors.


My comments:

If they use NTC thermistors as oven temperature sensors, the high temperture during self-clean cycle will easily damage the thermistor-type sensors.

If they use Metal RTD's (as most are), they could stand the high temperture. However, Metal RTD's are very fragile because they are constructed with fine wire to obtain about 1000 ohm at 70 deg F. The expansion and contraction due to large temperature change (from 70 to 850 deg F) could break (or short-circuit) the fine wire.




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