Hi, I have a BEST by Broan kitchen hood brought in 2001. The model # is k23 and it's a stainless hood with stainless chimney.
The hood have 3 speeds. About a year ago, the first two speeds stop working, so only high speed was still working. I removed the control board and did a bypass with a wire to test the switches. With the bypass, I was able to activate all the speed, so I thought the control panel was the problem. I ordered a new one and the problem remain. I then order a new circuit board and it did nothing...I'm confuse because the bypass still activate all speeds.
I need some help troubleshoothing this one. If it make a difference, the switches are design in a way that you have to press the first speed switch to activate the second speed, and let this one on to activate the third speed.
Hope I was clear enough(my english is not that good...I speak french).
I think I may have found the problem...after alot of research on the net, I found that a bad resistor may be the problem. As I understand it, when a resistor goes bad, only high speed is working. I ordered a new one today and I'll see How it goes.