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Unit attic fan will not shut off

Replaced the start up capacitor on out side unit ran fine for the last few weeks,yesterday noticed attic fan would not shut off ran all night now low out put like frozen over 90 degree day could not get temp below 80 degrees till one am went to 71 degrees only way to shut off motor was to turn off breaker,thanks Joe

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  • Joey
    Joey May 13, 2014

    a/c draining well nice puddle out side,checked evap cold no ice

  • Joey
    Joey May 13, 2014

    Hi Low side 65 si Hgh sde 20psi joeym

  • Joey
    Joey May 13, 2014

    sorry high side 200 psi joeym

  • George Andoniades May 13, 2014

    Low side 65psi is perfect make sure that the condenser in and out is clean



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Check the freon

Posted on May 13, 2014

Testimonial: "low side about 75-80 psi low side cold high side hot evap not clogged,I would think on auto I would get a few speeds,only one I even took off the green wire on t-stat to see if motor would shut down no luck.Joey"


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SOURCE: Outside air temp around 100 unit wasnt cooling

90 psi suction too high possible bad valves or non condensablies in the system (AIR) what is the head pressure and what type of freon r-22 410-A? your unit is never shutting off watch out for that electric bill. and did you take apart the condenser and clean it? Tom

Posted on Jun 25, 2009

  • 52 Answers

SOURCE: 2 weeks ago one of my units stopped working

sounds like the coils inside the air handler/furnace are freezing up. likely cause is the freon charge is incorrect (probably undercharged). it may have been correct when the tech did the work but some may have leaked out. it is slightly possible too that the system is overcharged. you should have the system pressure verified, and then have it checked for leaks.

Posted on Jun 18, 2009

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SOURCE: thermostat window ac turns unit on and off 8 degrees above se

the unit may be drawing the cool air it just released back into itself,plus the air close to the unit may be a little cooler than the air in the rest of the room.

Posted on Mar 19, 2009

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SOURCE: bought 2004 popup camper 3 weeks ago went to s.c.

Isolate the thermostat sensor. Hold it with your hand and see if it comes on and stays on. If so, replace the thermostat.

Posted on Jul 05, 2009

  • 2418 Answers

SOURCE: Water running through overflow

No, Do you mean that water is draining outside when it is running, if so, no need to be concerned. Yes yes yes be concerned if it is draining on to the ceiling.Get up there and ck the drain make sure the pan is tilted right to drain. ck the drain out side make sure it is free to flow. .

Posted on Jul 14, 2009

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