[FONT="Arial"]Wanted some opinions about using a Magnehelic Gauge for determining the proper time to replace fliters. Here's the story, I am very allergic to Black Mold Spores and must use 4" Merv 11 filters. I am installing a new Frigidaire 2 ton 14 Seer A/C and matching variable speed air handler with TXV. The question is: Will the magnehilic gauge give reliable results. I will be using a 1" W.C. (full scale) gauge across the filter. The filters are expensive so I did not want to rely on time periods, as the filter may get dirty early or later than scheduled changes. I also think a .4 increase in differential pressure is a good number to start with for changeing the filter. Regards, Sign-Man[/FONT]

OK...I am going to put as much info as possible to see if you can try to help me. My a/c has stopped blowing cold air. It just has a small amount of warm air coming out of the vents when it is on. I went out to the unit and the fan is not moving. I took off the cover and electrical panel cover. The small metal capacitor and it looked fine. It did not have anything that made it look bad. The large cylinder capicator looks normal as well. I don't see any burnt wires. The starter engages and disengages when the thermostat kicks on and off. When the power is applied a buzzing sound comes from the fan and it moves about a quarter of a turn. Twice I was able to use a stick to get the fan blade moving. It ran for about 45 seconds both times and then slowed and stopped. When no power is applied to the fan it moves freely. When power is applied and I try to move it with a stick it is very rigid and hard to move. I am hoping this gives you some info to give me ideas. Thanks for any help!! Swag