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OESP are holding their annual convention May 19-23 in Hershey, PA this year. This is going to be the first convention I go to for the HVAC world and I'm pretty excited to see whats all involved.
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Make sure the metal around the main limit isn't too close to the heat exchanger. If its too close it'll pick up the heat and give you a false limit trip.

The newer variable speed blower motors have limiters built into them so that even if its being told to push more air, the motor takes over and protects itself. When this happens you'll see extremely...