Is the tile against the ovens thermometer/sensor? If so, the oven may be
"cutting off" prematurely due to the oven's sensor reaching the desired
temperature on the side of the tile next to the heating element and oven's
thermometer. If you move the tile away from the temperature sensor in the
oven, it should stay "on" until the whole thing is up to temperature, not
just on one side of a single tile.

Sid

"Peter Cook" > wrote in message
hlink.net...
> Anyone encounter this? My electric oven is lined with quarry tiles since I
> bake a lot of bread. I use a Taylor thermometer to measure the temp, and
> when the tiles are in the oven, the thermometer reads significantly lower
> than the oven's digital readout after preheating. At lower temperatures
> (300), the difference is about 60 degrees. At higher temperatures (475),
> it's about 25 degrees.
>
> When the tiles are removed, the readout and the thermometer are within 3
or
> 4 degrees. I keep the thermometer close to the oven's temperature sensor,
so
> they are measuring temperature at the same location in the oven.
>
> All readings are taken after the oven has preheated for at least 45
minutes.
>
> Obviously the heating characteristics of an oven change when there are
tiles
> involved. But why would they cause the thermometer and the oven's
> temperature sensor to behave differently? And most importantly -- which
one
> is right??
>
> Pete
>
>
>
>