The cooker clicks over to "keep warm" before the

Make sure the bottom of the bowl and the inside of the cooker itself where the bowl rests are clean. If they are not the cooker will think the rice is cooked when it is not.

Have you tried scrubbing the inside (heating surface). Make sure there is no burnt on stuff on it and on the middle sensor (CENTER OF THE UNIT). I usually use a green scrubber with Comet. Also make sure that the bottom of the rice insert (outside) is clean.

Warm mode probably isn't going to cook anything. It's just to keep things warm.

check replace the micro switch of your rice cooker it is the switch that is connected to the cook and warm button....check for the heating ellement it is the coil that heats to do this open the bottom cover of your rice cooker you can see a round shape fillament examin whether this fillament is not brocken and is connected to the power source

Instructions quoted from the Durabrand Rice Cooker model HRC 18G manual...... 1 cup of uncooked rice rice will make about 2 cups of cooked rice. Add rice to the inner pot. Maximum four cups uncooked rice for the model. Many varieties of rice can be used including basmati, wild rice, arborio risotto, saffron rice and long grain rice. Whole grains, such as barley can also be prepared with the rice cooker, follow instructions on the package.

For every cup (160ml) of raw rice, add 1-1/2cups of water. For stickier rice add slightly more water, for fluffier rice use slightly less water.

When your rice is cooked, the cooker will automatically switch to the warm function and the yellow warm light will turn on. The cooker will stay in the warm function untill is disconnected from the wall outlet. The cooker will keep the rice warm 158F - 212F

Hope this helps, its quoted right out of the manual I have for my cooker

bad thermostat . there are no parts made for this model . sorry

try adding a little less water, And letting it sit about 4 min to make sure the steaming has stopped

well your rice cooker needs to be replaced.. if you still want to use it, then have it fixed by a technician coz it needs electrical expertise to handle the wirings inside it..