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Author Topic: Acceptable temperature variation on Kenmore 790.48739901  (Read 1393 times)

Offline aaronw112358

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Acceptable temperature variation on Kenmore 790.48739901
« on: March 16, 2016, 08:43:50 PM »

So we installed the above Kenmore oven to replace a whirlpool oven that kept blowing fuses and control boards due to overheating issues, I may have even posted here about that one.  Regardless, after some looking around, some people using the oven are convinced that there is too much variation in how it holds temperature.  They are basing this by using an oven thermometer in it and seeing that after the initial heat cycle if 400 (or whatever) is set that that thermometer is all over the place.  I realize there's some swings involved due to thermostat operation, but I'm getting the impression that this one seems to be much more chaotic.  Is there a 'normal' swing range or some other calibration I can look at to see if there is an actual issue, and if so, how I can resolve it?

Offline dab147315

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Re: Acceptable temperature variation on Kenmore 790.48739901
« Reply #1 on: March 17, 2016, 10:54:49 AM »
Use of these two Attachments may help.
« Last Edit: March 17, 2016, 10:55:18 AM by dab147315 »

Offline mz3own

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Re: Acceptable temperature variation on Kenmore 790.48739901
« Reply #2 on: March 17, 2016, 03:51:41 PM »
initial preheat will usually be higher so it can help bring the oven cavity up to temp.
Door opening can drop the temp over 100 degress in under 5 second.
The cheap metal dial therm are GARBAGE.... toss them.
Most ovens use an average temp. Think Signwave, you select 350... it preheats first cycle to about 380-400. cools down to 340-350 turns back on to 360-380 cools down to 330-340 so on and so on till the average temp is 350. Hope I'm building a clear picture. MOST, (not all) ovens use this method of heating.

Think cookies.
First pan of cookies takes about 12mins (give or take)
Last pan of cookies takes about 8mins (give or take)
Why you ask? because the cavity (metal body) of the oven is up to temp so the door openings don't effect the overall temp all that much. It can recover from those opening easier.

« Last Edit: March 17, 2016, 03:52:02 PM by mz3own »