Microwave shuts off to soon?? REPAIRING/FIXING MICROWAVE OVEN FAN

I had picked up a very nice stainless steel covered microwave at a yard sale for 5 bucks. They had told me it worked fine but they neglected to tell me it only worked fine for 4 minutes and then it would shut its self down and then you had to wait 3 minutes for the reset to take effect and then you had another 4 minutes of cooking.

Let me tell you this got old in a hurry. I looked on the internet for expertise advice by stating my case in the google search bar. There were 20 different relays and fix this and fix and replace thats on there.

I decided to just take the back cover off and have a look for my self.
once I was inside i was touching this and poking that and noticed it was really dusty inside with plenty of left over spider homes so i used my computer air can spray and clean it all out.
I thought maybe it just might have been the problem as bad as it was in there so I plugged it in with the back still off and it shut down in 4 minutes just like before.
Something was wrong and I couldn't quit place it so I tried it again after the relay clicked back on. Then I saw it. The cooling fan was not turning.
I unplugged it and tried to turn it by hand after squirting some WD 40 on it and the plastic blade would turn but not the shaft the blade was attached to. So I got a pair of pliers and worked the shaft until it broke free. Squirted a little more oil on it and it became nice and smoooooth oh boy!!!

I then plugged it back in and set the timer to 5 minutes. By the way never touch anything inside one of these while it is plugged in.
The microwave approached the 4 minute mark and I stood there with my fingers crossed watching the fan run as smoooooth as can be.
Wallah!! it passed the 4 minute shut off mark and made it to the 5 minute mark until it quit because the timer ran out.
I did this again at 10 minutes and it made it all the way through without shutting down.
I now have a great working $5.00 microwave and it didn't cost me anything more but a little time and couple squirts of oil.

So if you experience the same early shut down time then now you can maybe good lucky like me and repair it your self by a flick of the fan blade.
I hope this will help you same some money. The Raz Shack