The 2 beaters are touching each other and get stuck so it will not rotate. There is also a funny rattling noise. Sounds like something is loose inside. I can use it with 1 beater but very wobbly and noisy. The problem started when I was trying to make frostings for cupcakes. There was a lot of icing sugar flying around like a cloud then there was a loud noise before the beaters started to clash against each other.

The beater cannot "heat" the bowl, so I am going to assume that is a typing error, and you meant hitting.
If the beater hits the bowl it is usually caused by the adjusting screw at rear of the column being improperly set. To correct this you need to turn the adjusting screw slightly to right, or left to adjust clearance. Clearance should be 1/16", about the thickness of a dime.
If this does not fix the problem, and the beater still rubs the bottom of the bowl, it can be corrected by tapping the yoke arm with a mallet, there should be 1/16" clearance between bottom of bowl and end of the beater.
You can determine the 1/16" by dropping a dime in the bowl, the flat beater should just "touch" the coin as the beater rotates.
If you have questions feel free to call us @ the Mending Shed.
Thank you,
Colleen
Customer Service
MendingShed.com
800-339-9297

I have read on other posts that it is the nut at the top of the beater that is causing the problem. You need to rotate it downwards toward the beater in order to have sufficient room to push and rotate the beater out. This didn't work for me, nor did attempting to remove the whole plate by undoing the lug beside the beater insert. Now that I have worn the lug and the nut I cannot get it repaired at a Kenwood service specialist as I have attempted the repair myself.
My advice is to go straight to a professional. Whatever they charge it will be cheaper than being stuck with a machine you can only use some of the time and have to replace!

One of the beaters had jumped a gear. I understand they are nylon gears. My wife's had the same trouble. I unplugged the mixer, removed the bowl and install the beaters if you can to see where they are touching. They were two cogs off. I grapped the left (red) beater firmly and twisted it to the left. It took a couple tries and turning on the motor (with out beaters) to find the spot where they had skipped. In the end the left beater jumped back one then two teeth and now the beaters aline properly.
This will happen again with heavy dough, etc. now that the teeth are worn in that spot. Use a bread machine for the heaver dough. IMHO

oh yes you can.:) pur some wesson oil into the sockets the beaters go into and a little around the button.. Let set a few minutes and work the beaters back and forth as you pull gently. Make sure it is unplugged!!!!!

It probably is .. The most common cause is something got stuck in the beaters and some gear teeth got damaged.. They are very easy to replace but can be a little messy because of the grease on the gears. If you tell me your make and model I will tell you what parts you probably need

I would check the bottom of the beater blades to see if they are out of shape.,or is the base of the mixer raised somehow to cause this problem

Here's how to fix the stuck implement problem:

The implements each have adjustable heights. to adjust the height you need to loosen the bolt at the top with a 14mm spanner. If the bolt was loose when it was being used then it can get too short and not leave enough clearance between the bolt and the machine in order to push up and turn to release the implement. If this happens take the open ended spanner, grasp the implement and rotate the spanner clockwise (when looking up at the machine from below. Once the nut is loose rotate the implement until there is enough clearance to remove it normally.

I had this same problem as well.  The beater was stuck like glue to the rotating arm, and it would not budge with any amount of pressure.  I tried the cooking spray and it did nothing.  But today I put a rag in hot/boiling water and then carefully wrapped it around the top of the beater.  I let it sit for 10 minutes. Then I put the rag in hot water again and repeated the process for about another 5 minutes.  When this was done, I covered the beater in a towel (to protect it) and forcefully tapped (ok... I pounded) it with the flat side of my meat tenderizer (it was all I had...you could use a mallet or hammer).  It took a little bit of work because I had to hammer it from the bottom, then the side, then the top to get the little spoke guided through the shaft.  But it did finally come off.  After cleaning with hot water, I put the beater on again and noticed that it was still a little hard to get on/off.  So, I put a little bit of veg. oil on it, and it seems to be better.  Going forward, I will be sure to clean the top of the beater & arm after each use and then coat it with a little oil to keep from sticking.  Best of luck!

I took the advice from: http://forum.kitchenaid.com/forums/topic.asp?TOPIC_ID=6356
I put a wash cloth in a pot of boiling water and used tongs to wrap it around the beater shaft while the mixer was resting on its side. When the wash cloth was not too hot to touch, I put it back in the boiling water and did it again. I was then able to easily remove the beater.

You will have to have the transmission serviced. sounds like the gears were ground out. you can do the service work yourself its not to difficult.