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just bought an Intellichef by Morphy Richards,instructions state boil temperature is 240 degrees C,slow cook temp 120 degrees C;this seems to be too high for slow cooking;my old slow-cooker just bubbled away slowly,this one appears to be boiling almost straight away.I have contacted the company but not had a reply yet,does anyone else have one of these new multicookers?

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Are you sure you're not confusing the Celsius and Fahrenheit units? – Mien Mar 16 '14 at 15:15
@Mien Those temperatures are still inappropriate in Fahrenheit (240 is too high, and 120 is too low to be safe). But the manufacturer is British, and definitely doing Centigrade. – SAJ14SAJ Mar 16 '14 at 15:19

You are correct that the indicated temperatures are too high. 240 C (480 F) is a very fast oven temperature, and inappropriate for almost all direct contact cooking methods. Even 120 C is well past water's boiling point, and so not achievable in slow cooking.

A more typical an appropriate braising or slow cooking temperature would be 82 C (180 F).

Assuming this is the instruction booklet for the product you have, it appears the instructions for slow cooking are actually trying to get you to do a two part braise (they even seem close to identical to the braising instructions): first searing the meat for flavor development through browning, and then a longer cooking period. The higher temperature is intended for the searing phase; they then you have reduce the temperature to about 100-140 C.

This is still too high for braising, but that may be the temperature the device's thermometer will perceive at the bottom of the cooking insert. You want the temperature in the actual food to be about 82 C—use an instant read thermometer to help learn where to set the dial.

Similarly, the boiling temperature is almost certainly again set too high (as water, by definition, boils at 100 C), with the intention of putting the device at its maximum power to bring the water to boil and keep it boiling rapidly.

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