Posted by Paul K. (66.42.130.36) on February 06, 2008 at 19:59:03:
In Reply to: Blower Motor Whining posted by Jerry on February 01, 2008 at 18:53:05:
: Blower Whining –
: I recently had a Rheem modulating furnace and two-zone heating/cooling installed. They also installed a 10 inch bypass damper and a 3.5 ton air conditioner.
: I had a problem with my blower motor whining which was caused by too much backpressure in my duct work. The contractor is talking about two solutions.
: 1.Increase my bypass damper to 12 inches.
: 2.Reduce my blower speed.
: Is one option preferred or does it not matter?
: Thanks,
: Jerry
Jerry, I would not reduce the blower speed very much because that will reduce the efficiency of the heat transfer from the neat exchanger.