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Why does my microwave vent a hood beep every 15 minutes

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Samsung microwave oven model SMH1622S exhaust fan will not shut off high fan and low fan will switch but the off dose not work.


On model SMH1622S, I would first check the hood TCO. It should be normally open (infinite resistance on a continuity test). If it has shorted, then the hood vent exhaust fan will stay on.

If that's good, then it is probably a shorted vent relay on the control board, which I can repair.

Details are here, where I also have a video showing how to remove the grille and controller assembly in about 5 minutes.

If you have any trouble getting the grille off once the screws are removed, slide the hood vent grille to the left about 1/4", then then pull it forward. On some models there are L-shaped clips that fit into a slot to hold bottom of the vent.

The Fast Track repair manual for model SMH1622 is here. It will be useful.

If you have other questions, it's best to follow up with me directly.
(FixYa does not notify us directly when follow-ups are posted, so we have to log in to the site to see them.)

- William E. Miller, AS-EET
pupista@gmail.com
http://www.microwavecontrol.com
Microwave Oven Control Panel Repair Nationwide
"Recycling by repairing since 1982"

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May 23, 2017 | Samsung Microwave Ovens

1 Answer

My microwave oven model 721.85033111 vent fan stays on


You probably have a bad fan thermostat. This thermostat is supposed to turn on the vent fan if the microwave oven gets too hot (caused by cooking too much or having too many burners turned on on the range beneath the microwave oven). It should shut off in about 15 minutes after your turn off the range burners. But if it comes on for no reason, or won't turn off, then You probably have a bad fan thermostat.

Aug 10, 2014 | Kenmore Microwave Ovens

1 Answer

Emerson microwave mwg9115sl over heats then turns back on after 20 minutes


Your magnetron is overheating, which can be caused by:


  • operating oven without cover(s) in place
  • wrong magnetron installed in oven
  • an old or otherwise failing magnetron
  • cracked magnetron magnet
  • improper power line voltage (should be 110-125VAC)
  • foods low in moisture (popcorn & bacon, e.g. - add 1/2 cup of water in rear oven)
  • failed or inoperable cooling fan or hood vent exhaust fan
  • deteriorating foam weatherstripping seals in air ducts or on outside cover
  • blocked air vents (dust, animal nest debris, insufficient free air space behind & around oven, etc.)
  • clogged or greasy charcoal filter or grease filter
  • blocked duct in hood vent exhaust

The first suspects in my book are fan failure, blocked vents, or bad magnetron.

Jan 10, 2013 | Emerson Microwave Ovens

1 Answer

Our Sunbeam model SM15A19W over the range microwave quits after 3 - 4 minutes of use and we have to wait 15 minutes and it comes back on. Is there anything I can replace myself?


Had a similar issue I found the unit was overhaeting and if I ran the air vent while in use it helped cool it is this a non-vented system mine is

Sep 03, 2012 | Sunbeam Microwave Ovens

3 Answers

Samsung microwave SMH8165W displaying error code -SE- and continuously beeps.


SE means system error, the keypad has a short in the membrane, or the control board has issues.

Jun 14, 2012 | Samsung SMH8165W Microwave Oven

1 Answer

JennAir Microwave works perfectly but won't quit running.


One or two of the micro switches have failed, you will need a professional to remedy the situation.

Apr 03, 2012 | Jenn-Air Microwave Ovens

1 Answer

Does the exhaunst fan turn on automatically when we cook or warm food items in our Samsung Microwave -- SMH 9187W?


Some interesting reading on page 8 of the owner's manual:

"Boilovers cause smoking and greasy spillovers that may ignite and spread if the vent fan is operating.To minimize automatic fan operation, use adequate sized cookware and use high heat on surface units only when necessary."

And on page 20:

"If the temperature becomes too hot around the microwave oven, the fan in the vent hood will automatically turn on at the LEVEL 2 setting to cool the oven. The fan will automatically turn off when the oven has cooled down sufficiently. This is an automated process and cannot be turned off. The fan may stay on for 30 minutes or more after the cooktop and microwave controls are turned off. The Vent Fan will only operate in 1~4 levels modes while the microwave is working."

"Using the Vent delay off button
1. Press the Delay Off button once to turn the fan off after 1 minute.
2. Press the Delay Off button twice to turn the fan off after 3 minutes.
3. Press the Delay Off button three times to turn the fan off after 5 minutes.
4. Press the Delay Off button fiour times to turn the fan off after 10 minutes.
5. Press the Delay Off button five times to turn the fan off after 30 minutes."

If for some reason you don't have your owner's manual, you can still download it free here.

We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer

Jan 01, 2011 | Samsung Microwave Ovens

1 Answer

Model mmv1163dw00 had put frozen veggies in for 15 minutes, when done it beeped and then it went dead. I unplugged, tested my outlet which was okay. waited about and hour and plugged in and it worked. Can...


Yes, there is a thermostat on the magnetron that detects when it overheats.

When it does, it will shut down power until it cools back down.

This protects the magnetron from the destruction posed by overheating, which can be caused by:
  • operating oven without cover(s) in place
  • wrong magnetron installed in oven
  • an old or otherwise failing magnetron
  • cracked magnetron magnet
  • improper power line voltage (should be 110-125VAC)
  • foods low in moisture (popcorn & bacon, e.g. - add 1/2 cup of water in rear oven)
  • failed or inoperable cooling fan or hood vent exhaust fan
  • deteriorating foam weatherstripping seals in air ducts or on outside cover
  • blocked air vents (dust, animal nest debris, insufficient free air space behind & around oven, etc.)
  • clogged or greasy charcoal filter or grease filter
  • blocked duct in hood vent exhaust
Check as many of these these things as you can and correct as necessary.

You can find helpful exploded view diagrams and order parts by entering your full model number here.

Let us know if we can help further.

We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.

Aug 21, 2010 | Maytag MMV1163DS Stainless Steel 1000...

1 Answer

Whirlpool Microwave Hood Combination MH3184XPS-0 (October 2004), for no reason at all, this morning keeps beeping and running the power setting down from 10 to 1, and just keeps doing it in rapid sequence....


Ours just started doing this exact same thing this past Friday - 12/11/09. What's going on? The cook power just starts beeping all by itself and going from 10 down to 1 over and over again. It may stop momentarily, but then starts again within a minute or so - it's constant until we unplug it. We plug it back in and within a few minutes it starts doing it again. What gives?

Dec 08, 2009 | Whirlpool MH3184XP Microwave Oven

1 Answer

Turbo vent won't turn off


This is usually caused by a shorted hood thermostat or a shorted triac on the control panel circuit board.

The hood thermostat is usually located on the floor of the microwave chassis behind the control panel. It should read "open" or "infinity" on a continuity or multimeter resistance test.

At our site, we now have a video available showing how to remove a typical control panel assembly in under 5 minutes.

If the hood thermostat is bad, You can order Samsung parts here.

If you think the problem is on the control panel, we repair these nationwide by mail for $39.95 postpaid in most cases.

Feel free to contact me directly for more information & help.

We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.

William E. Miller
prototech@usa.net
http://www.microwavedisplay.com

Sep 03, 2008 | Samsung SMH7178STD Microwave Oven

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