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Old 04-06-2012, 12:48 PM   #1
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Air handler not pushing enough air


As much AC trouble as Ive been having lately, thought it might be smart to actually join a chatroom....

I recent bought a new house and have to rent the old one... thanx to murphy's law, the rental has had multiple AC issues right after starting to rent it...

first the outside fan motor bearings went out and cost me 400 to have fixed... if I was living there I would have taken the time to do it myself, but dont have the luxury since its a rental...

Now, after having some freon added, the air is nice and cold, but there isnt much force...
I climbed into the attic and looked around for leaks, but saw none...
I also noticed the air handler seemed really quite while running compared to what I remember when I lived there...

Could it be the Capacitor, would that stop the motor from running as fast?

Thanx for your help...
Danny

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Old 04-06-2012, 06:19 PM   #2
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Air handler not pushing enough air


Could be the cap, or could be a dirty air filter and or evap coil.

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Old 04-06-2012, 06:36 PM   #3
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Air handler not pushing enough air


Thanx for the reply...
Definitely not the filter... and I assume the coils are fine since two different techs looked at the system and said the look fine...
Hoping its the cap
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Old 04-06-2012, 06:56 PM   #4
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Air handler not pushing enough air


Direct drive or belt driven blower? It's possible the belt is loose or worn if the latter. Has the motor been replaced or rewired to run at a lower speed? Lots of variables, sorry. Obstructed intake, bad filter, many different possible causes.
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Old 04-06-2012, 07:01 PM   #5
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Air handler not pushing enough air


Direct drive
Set on highest speed
Original motor
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Old 04-06-2012, 07:04 PM   #6
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Air handler not pushing enough air


If you're sure that your ducts are ok. Then yes it could be a capacitor and a motor. I would replace the capacitor since it's cheap. It could also be that the tech reduced the cooling speed when he was there. Try the capacitor first. If you have a meter, then you can know for sure. If you have one let me know and I will show you
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Old 04-06-2012, 07:10 PM   #7
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Air handler not pushing enough air


I have one... doesn't do capacitance though... but I can check it for open or short....
Now I just need to find a local place open tomorrow.
Thanx for your help...
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Old 04-06-2012, 07:15 PM   #8
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Air handler not pushing enough air


Many techs look at one side of the coil only.
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Old 04-06-2012, 07:23 PM   #9
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Air handler not pushing enough air


Quote:
Originally Posted by dcastillo View Post
I have one... doesn't do capacitance though... but I can check it for open or short....
Now I just need to find a local place open tomorrow.
Thanx for your help...
You can check it with an ohmmeter...preferably an analog meter. At 1K it should move to 0, then swing to infinity.
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Old 04-06-2012, 10:24 PM   #10
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Air handler not pushing enough air


Quote:
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Direct drive or belt driven blower? It's possible the belt is loose or worn if the latter. Has the motor been replaced or rewired to run at a lower speed? Lots of variables, sorry. Obstructed intake, bad filter, many different possible causes.
When the guy was replacing the bearings on squirrel cage could he have adjusted the pulley on motor slowing it down?
Could it just be that the motor sounds quieter now with new bearings in squirrel cage?
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Old 04-07-2012, 04:34 AM   #11
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Air handler not pushing enough air


Quote:
Originally Posted by dcastillo View Post
Thanx for the reply...
Definitely not the filter... and I assume the coils are fine since two different techs looked at the system and said the look fine...
Hoping its the cap
They may have only looked at the discharge/fan side of the A/C coil. may techs don't look at both sides of the coil.

Could also be that they wired it to run on low speed by mistake.
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Old 04-07-2012, 05:08 AM   #12
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Air handler not pushing enough air


Sorry for the confusion...but it was the outside motor that was replaced, the inside unit hasn't been touched by the techs, only inspected.
Thanx
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Old 04-07-2012, 05:30 AM   #13
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Air handler not pushing enough air


Could have loose insulation in the blower compartment, that is blocking air flow.
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Old 04-07-2012, 05:56 AM   #14
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Air handler not pushing enough air


to check that I would need to remove the blower and look up, right?
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Old 04-07-2012, 06:38 AM   #15
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Air handler not pushing enough air


Is it a furnace with A/C coil on top of furnace? Or an air handler.

It can be very hard to see the inlet side of the evap coil, if your looking up from the bottom of the furnace, but it is possible on 80% efficient furnaces.

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