the only way is to block off/check the flapper., if your not going to use for the winter you can disconnect the vent from under the cabinet temporaily and close off there till you can gain access to check outside grill
They suggested a dryer because they thought the stone had absorbed a liquid and was causing the stone to darken. This is common on unsealed granite. If you put a sealer on the counter tops however, whatever it is you see there will remain under the seal. I would ask the installer to come out and take a look at it. If they are unwilling, the Home Depot has a cleaning kit sold in the kitchen counters area of the store made by a company you can call and they will ask questions about the problem and provide advice on how to fix it. They are extremely helpful with free suggestions as well as stuff you may be able to purchase to fix the problems. In any case, granite is sensitive stuff and while it is physically durable it seems to be extremely sensitive to stain and etching and learning about proper care, cleaning, and dos and dont's will save a lot of heart ache and time for you down the road. (For instance oil absorbing into the stone is a several day ordeal to fix). Good luck with getting the results you want. If you did find a specific solution please share it here.
In case anyone else encounters this problem here's what
worked for me. I had this happen last night and came here
searching for answers. It did not unloosen on it's own
after being left overnight. Finally this morning I came up
with something that worked for me. Shoot the lid all
around with a hairdryer and use a towel to keep seeing if
it has loosened up enough to move. After a few miuntes of
spraying it with the heat it stared sliding around and then
Use Cooktop Cleaner with a soft micro cloth. Don't use water. Buff until the mark disappears.
Hint: Never clean the cooktop until it is completely cool to touch as doing so makes cleaning much harder. Never use abrasives on the glass or abrasive cast iron skillets.
The cook top is connected to 220 volts. In the house wiring there are two legs each 115 volts. Usually they connect with a red wire, black wire and the third a neutral. It is likely that at the connection to the unit or at the electrical box a connection has failed or the 220 volt circuit breaker has failed on one leg. A qualified electrician needs to do the repair!
I had no instructions, manual, no receipt at all, due to a residential move. I asked questions and described the product numerous times - even went to Office Max to ask for any advice, describing what the Router action was and what was different. They gave me a list of possible Router Companies. This led me back to several phone calls, which did finally help. Guess what - part of the problem was with new techniques at my "Online Provider."
You probably need to replace it. They are though fairly expensive. A little under $200 to be exact. http://www.partstore.com/ModelSearch.aspx?MfgName=Maytag&BrandName=JennAir&CloselyRelatedModels=true&ModelNumber=JED8430&x=41&y=30
PLEASE don't 'fiddle about' with the cooker if you don't know about electrics. There are VERY high powerand DANGEROUS electric cables in there ! This is Nothing like a low power Stereo or TV BE CAREFUL !!!!
I am not familiar with this top but it seems from the diagrams that it just drops in to a base unit that contains the fan unit.somehow. I don't see any screws in the surface of the top so TURN OFF THE POWER COMPLETELY take out by lifting the edges ; the whole thing and work on it from underneath to access the electrics..
These diagrams below will show you all you need to do the job. READ THEM THOROUGHLY BEFORE you start.
PLEASE BE CAREFUL with Electrical wiring. !!! I cant stress enough