This is a 42 inch with a single blower, 4 speeds, 3 lights, I believe all WT32I series are much the same. The problem is something that has been widely reported and complained about, it's their 'feature' called Heat Sentry. Basically if some sensor detects (or thinks it detects) excessive heat, it takes over blower control and runs the unit on speed 3 (even if you had it on highest speed 4). An indicator light flashes to inform you as to what is happening. The problem is, this takeover occurs at all sorts of times, including many where it's very clear there is no excessive heat present, nor has there been. It's quite loud at speeds 3 and 4, and it will run about 20 minutes. Only way to get if off is to head to the breaker box and cycle power. I note that when I do this - and the box is very close, and I can cycle in 15 seconds after it starts up - it does not kick back on on it's own. So there must not be excessive heat. Indeed, generally the entire hood is cool to barely warm to the touch, except around the lights (halogen, and quite hot). Last night we ran a burner on high for a bit, another on simmer, turned them off, set the blower to speed one, and sat down to eat. 10 minutes later the thing just kicks on by itself. Cycle power and it stays off (ie, no excessive heat). Similar things happen over and over. At other time we run multiple burners for extended times with blower on 2, and this takeover never occurs.
At this point, I need to do one of 2 things: I need to disable this 'feature', or, just rip it out and replace it. It was not cheap and is less than 3 years old, it exhausts quite well on speed 2, which is also a tolerable noise level. It's less than 3 years old.
Can anyone tell me how I might defeat this thing. I also note that, to my knowledge, no other manufacturer incorporates any such 'feature' into their products. Also I read that they sell these in Canada as well, but this 'feature' is not included, as it violates some code.
Thanks for reading!