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Exhaust fan comes on with left burner switch - Whirlpool SC8720ED 30" Gas Cooktop, 2 Open Burners, Downdraft Ventilation System

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Whirlpool SC8720EDB cooktop stove independent vent switch is not starting downdraft exhaust fan, but the exhaust fan works fine when left side burners were turned on


Can you get to the switch terminals and try jumping them out with a piece of insulated wire? That would tell you if the switch is defective (my suspicion). Please be careful not to touch any live terminals - only the wire insulation you use for the jumper.

Aug 02, 2017 | Whirlpool Cooktops

1 Answer

We have a whirlpool gas cooktop, Model SC8720EDB, Serial FMG1005626. When the left two side burners are lit, either one or both, the suction fan automatically cuts on. When the right side burners are...


It does this by design. It is a safety feature on this model because it was designed to have a gill module on the left side. I don't know if you can change it without replacing the two left control valves with valves like it has on the right burners.

Nov 24, 2010 | Whirlpool 30 in. SC8720 Gas Cooktop

1 Answer

How do you get the black top off. I have to put in a new front burner. Thanks.


I had the same problem. Mine was caused by liquid seeping into the infinite switch (the switch that gets rotated by the knob to set burner temperature). This caused one of the live wires to short to ground within the switch. Bad Design IMHO. Replacing the switch fixed the problem (you can get replacement parts at Searspartsdirect.com - search using the cooktop model number).
You first need to remove the unit from its installation. Start by disconnecting the exhaust fan from the ductwork. Then push the cooktop up.
To get at the switch you need to remove the top by taking off only the top row of screws all around the unit and also in the down draft cavity (the down draft cavity is where the grease guard mesh is)

Turn off the circuit breaker to the cooktop. Verify by making sure the burners/fan do not come on. Disconnect the exhaust fan (underneath the cooktop) from the ductwork by removing the tape that joins it. While you are underneath the cooktop, open the junction box. Label the four wires that are joined so that you will be able to connect them later. Then disconnect the four wires. Remove the metal sheating that connects to the junction box (there is a nut on the inside of the junction box that you loosen. Pull out all the supply wires (from the mains) from the junction box. Then push the cooktop up and out and lay it flat on a table with the flat side down.
Take off only the top row of screws all around the unit. Rotate the unit so that you can get to the down draft cavity (the down draft cavity is where the grease guard mesh is). Remove the two center screws. Then pull the black top off.

For an exploded view of the unit check out
http://www.appliancepartspros.com/partsearch/model.aspx?model_id=47639&diagram_id=681565#d681565

Sep 03, 2009 | Jenn-Air JED8430 Electric Cooktop

1 Answer

Jenn air fan comes on with rear burners (elec) can I disable?


Perhaps, but sound safety says no. This generates a lot of heat in an enclosed space; the fan may be a nuisance but it is needed to keep the unit from getting too hot. Hope this helps!

Dec 27, 2008 | Jenn-Air JED8430 Electric Cooktop

1 Answer

Exhaust turns on automatically in burner mode


Hello
I have the one with the 4 burners and the grill, and when the grill in on the fan has to come on, and it does automaticly, but once you finish with the grill you have to change it back to stove mode by putting the 2 burners back or the fan will allways go on when you turn the switch. It is a safety regulation for the fan to be on with the grill to avoid the fumes......I know I hate that too.
Hope this help

Eddie Rentas
Tupper Lake NY

Jul 19, 2008 | GE 30 in. Profile JGP979 Gas Cooktop

1 Answer

Burner clicks a long time before igniting you can smell the gas


Not sure about what part 1 is about. #2 indicates a failing ignitor gap or a bad gas mix. Get professional assistance.

Jun 13, 2008 | Jenn-Air 34 in. Expressions CVGX2423 Gas...

1 Answer

Jenn-Air 30in. Exaust problem


liquid spill and alarm won't go off.

Mar 21, 2008 | Jenn-Air 30 in. CVG4280 Gas Cooktop

2 Answers

Exhaust fan comes on when burner turned on


The left side is set for your grill. There is apparently a switch under the left side top / front of the cooktop. The aeration tray has a prong on one end that fits into a hole in the front end of the burner basin and activates the switch which stops the fan from coming on when using the burners and allows the fan to run when using the grill. Try switching sides with the aeration trays as one might make better contact than the other.

Dec 01, 2007 | Jenn-Air 30 in. CVG4280 Gas Cooktop

3 Answers

Ventilation system on Jenn Air CVG4280


My Jenn-Air had the same problem. When you install the drip pan for the burner module, there is a "finger" on the pan that is inserted into a hole in the front of the stove. If you look into that hole, you will see a lever switch. The finger on the drip pan on the burner module is supposed to push that lever switch down and turn the fan off, but over time the lever gets pushed down further and ultimately it does not get activated when the drip pan is installed.

You can either replace the lever switch, or you can try to pull it back into place and tighten the two small screws that hold it in place. Actually, I chose a third option and attached a small, flat spring to the finger on the drip pan.

Oct 17, 2007 | Jenn-Air 30 in. CVG4280 Gas Cooktop

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