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I have a Quasar microwave (can't find the model # but took a guess based on an old post from

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Old 10-15-2008, 07:18 AM
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Default Quasar went dead
Model Number: MQSV115E (I think)   Brand: -brand-   Age: More than 10 years   

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I have a Quasar microwave (can't find the model # but took a guess based on an old post from Nov 2007) that was heating water on a 3 minute cycle, but when the cycle ended, the exhaust fan came on and all control buttons and lights went dead. The exhaust fan continues to run and can only be stopped by unplugging the main power cord. Am I looking at something simple like a blown internal fuse, or worse? I'll be removing the unit tonight and would appreciate any tips I can get on what to immediatley look for.


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Old 10-15-2008, 07:32 AM
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You model number should be on the frame of the microwave after you open the door.
Nat
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Old 10-15-2008, 07:44 AM
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Thanks Nat,

It is a model MQSV115E, manufactured in June 1992. It's old but has been a great oven and I would prefer to repair it if possible and cost effective.

Any tips on what to look for?

Doug
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Old 10-15-2008, 08:22 AM
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My guess would be that the moisture/steam is getting into the control board causing it to shutdown. You might also want to check any bare wires inside the unit. Causing a short.
This brand is not one we are accustomed to working on as parts are not available from our normal suppliers. So these suggestions are just that, an semi-educated guess ;o)

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Old 10-15-2008, 09:08 AM
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Nat,

Thanks for the info. I'll crack the case this evening and see what I can find that's obvious.

Doug
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Old 10-15-2008, 09:25 AM
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Kinda sounds like the cavity thermal closed from to much heat which kicks on the blower motor to cool it down. The thermal should be restable probably by freezing it. The thermals are usually located in the control panel area. or on top of the unit behind the grill. sometimes there are two of them One is normally closed and one is normally open until to much heat gets in that area then it closes and puts power to the fan motor. Sometimes they are resetable sometimes they need replaced depending on the thermal You can tell if its restable because it will have two temp ratings on the thermal one temp when it closes and one temp when it's open. Thats my guess
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Old 10-15-2008, 09:32 AM
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v2k04,

Thanks for that tip. When I pull it out and open it up tonight I'll definitely check the thermal contacts.
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Old 12-01-2008, 06:43 PM
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What if this same unit runs, then stops while the timer keeps going? I open the door, let it sit for 10 seconds then it starts again. Sometimes it will just restart on it's own. Is this a contact issue as well?

Last edited by Moose Knuckle : 12-09-2008 at 08:34 PM.
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