Posted 29 October 2006 - 03:27 AM
Thanks in advance...
Posted 30 October 2006 - 06:59 PM
Measure the air temperature at the return air duct (should be about room temp) then measure the supply air temperature a few feet downstream of the plenum. Subtract the return air temp from the supply air temp and compare this to the rating on the name plate (ie - 40-70F). If the temperature rise is above the rating then speeding up the blower is an option after you verify the filter is clean, the blower wheel is clean, the a-coil is not plugged, and all registers and return air grilles are open.
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