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Central air running all day and not cooling properly...

About a month ago I had to take apart the out side unit fan and clean it, it got stuck, its working now. a week after i started hearing a noise every time the blower shut off, like the vents scratching the corners. We got it out and some how the vents got loose on the shaft and was cousing free wheel motion. also cleaned the outside coil, cheked freon (ok), air pressure, (ok). now the noise is gone but it still not cooling the house properly. there is no ice... although its summer and temperture during the day out side its over 91° to 100° the system its usually stopping around 4:am and it comes back up around 10am.
Any ideas?

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  • ejflores07 Jul 18, 2009

    the capacitor is good, and the fan position problem fixed. but wht you say about the compressor make sense or the condenser. the blower blades has been creating resistance for a few weeks and tht might made other components in the unit to over work... the air sometimes feels like a lil moist... I think im gonna keep the unit off part of the day... dont want to hurt my wallet when the electric bill comes.

    Thanks!

  • ejflores07 Jul 18, 2009

    the inside unit in the attic (lennox cb-30m).
    yes I meant to say the blower wheel.
    the freon and the pressures i got a friend help me w tht, so i dont know what kind. the suction pressure was around 70.

  • 420heff May 11, 2010

    what kind of unit is it what is vents on shaft ?do u mean blower wheel?what kind of freon what are the pressures suction and discharge

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Did you fix the problem with the fan. Some times the placement of the fan blade up or down influences he air flow. May not be moving enough air across the coil. Sounds like it is over heating the compressor. To much amperage. You also may be losing conductivity of the condensor. When they get ols the fins go bad and loose conductivity. Also check capacitor it may be weak and causing compressor to pull to much amps. The capacitor starts the unit and also lowers the running amps by pulling the start windings in phase with the run winding. Russ

Posted on Jul 18, 2009

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