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GE Profile PT970BM1BB Microwave Buzzes when Door is Shut

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My 4.5 year old GE Microwave PT970M1BB Buzzes Loudly when the door is shut. This microwave is built-in with an

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  #1 (permalink)  
Old 01-20-2013, 12:56 PM
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Default GE Profile PT970BM1BB Microwave Buzzes when Door is Shut
Model Number: PT970BM1BB   Brand: GE   Age: 1 - 5 years   

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My 4.5 year old GE Microwave PT970M1BB Buzzes Loudly when the door is shut. This microwave is built-in with an Oven below.

Loud buzzing starts immediately when the door is shut.

So far, I have replaced the Transformer, Magenetron & a plastic "Air-Cover" (basically a duct that goes between the Magenetron & the side wall of the microwave cooking chamber).

The original "Air Cover" was melted on top so I assumed the Magnetron was overheating causing this problem.

I just completed the replacement of all these parts and when I shut the
door the buzzing starts and I see some "whisps" of smoke coming up from the magenetron. I am not sure if this is just because it is new and needs to break in a little and burn off some paint or if this is another symptom of the real problem.

I called one of the sales folks and they looked up my problem and said that other Posts have indicated either a bad door switch or the control board for the microwave.

Hopefully this will be a relatively cheap-fix since I have already sunk alot of money and time into this unit.

Thanks for your help.

Bill


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  #2 (permalink)  
Old 11-08-2013, 06:09 AM
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Default

Quote:
Originally Posted by bill@billory.com View Post
My 4.5 year old GE Microwave PT970M1BB Buzzes Loudly when the door is shut. This microwave is built-in with an Oven below.

Loud buzzing starts immediately when the door is shut.

So far, I have replaced the Transformer, Magenetron & a plastic "Air-Cover" (basically a duct that goes between the Magenetron & the side wall of the microwave cooking chamber).

The original "Air Cover" was melted on top so I assumed the Magnetron was overheating causing this problem.

I just completed the replacement of all these parts and when I shut the
door the buzzing starts and I see some "whisps" of smoke coming up from the magenetron. I am not sure if this is just because it is new and needs to break in a little and burn off some paint or if this is another symptom of the real problem.

I called one of the sales folks and they looked up my problem and said that other Posts have indicated either a bad door switch or the control board for the microwave.

Hopefully this will be a relatively cheap-fix since I have already sunk alot of money and time into this unit.

Thanks for your help.

Bill

Hi Bill, We have same issue with our GE Profile Microwave..when shut the door some buzzing sound.

you mentioned Bad door switch or control board..how did you fix it?

Please let me know

Thanks in advance
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  #3 (permalink)  
Old 11-08-2013, 07:12 AM
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Default Buzzes Loudly

I ended up replacing the Control Board and all was OK after that.

Check your Air Duct and make sure it is not melted - If it is, I would recommend replacing it while you have the unit torn apart.

Good Luck

Bill
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  #4 (permalink)  
Old 11-08-2013, 07:31 AM
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Default

Quote:
Originally Posted by bill@billory.com View Post
I ended up replacing the Control Board and all was OK after that.

Check your Air Duct and make sure it is not melted - If it is, I would recommend replacing it while you have the unit torn apart.

Good Luck

Bill
Thanks Bill!!
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