Summit gas wall oven whistling...

Since we had our gas wall oven installed this past summer it whistles very loudly when the fan kicks on. Before that it's normal sounds of the gas and the flame igniting. This is not a convection oven, just a normal one that bakes and broils. Since it only makes the sound when the fan kicks on, we are thinking it may be a fan motor. Does that sound plausible? I have called 4 different appliance repair people out and they either tell me they can't work on gas wall ovens, or they are booked up for the next two weeks. Thursday is Thanksgiving and I really cannot bear to hear the whistling sound ALL DAY LONG. Hoping someone has a quick fix we can try! Gas connection was made using the appropriately sized lines, manufacturer supplied regulator, and leak checked with no issues. It's ONLY when the fan kicks on that it whistles. Also, there is no warranty with this oven, and the manufacturer keeps telling me that it's a ventilation issue, which we know it isn't because we completely removed the drawer beneath the oven for maximum air flow and it still whistles. HELP?!

 

Welcome to the forums.

When posting and asking for help with appliances.... always post the make and model number.
It speeds the process and we can help you faster.
I see Summit.... could use a model number.

I don't recall hearing a fan issue recently in a wall oven.
I don't see many wall ovens or at least I don't get many calls for wall oven repairs.

With the appliance info I'll check further for you.

 

Maybe the fan output duct is partially blocked.
If it makes sound the same way a flute makes sound I'd look for a small opening where some of the fan air is escaping.

You may be able to localize the sound using one end of garden hose as a microphone, with a helper at the other end quite a distance away.