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-   -   Air handler not pushing enough air (http://www.diychatroom.com/f17/air-handler-not-pushing-enough-air-139440/)

dcastillo 04-06-2012 01:48 PM

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

beenthere 04-06-2012 07:19 PM

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

dcastillo 04-06-2012 07:36 PM

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

Missouri Bound 04-06-2012 07:56 PM

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.

dcastillo 04-06-2012 08:01 PM

Direct drive
Set on highest speed
Original motor

Mr.HVAC 04-06-2012 08:04 PM

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

dcastillo 04-06-2012 08:10 PM

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...

beenthere 04-06-2012 08:15 PM

Many techs look at one side of the coil only.

Missouri Bound 04-06-2012 08:23 PM

Quote:

Originally Posted by dcastillo (Post 893257)
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.

plummen 04-06-2012 11:24 PM

Quote:

Originally Posted by Missouri Bound (Post 893250)
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? :)

beenthere 04-07-2012 05:34 AM

Quote:

Originally Posted by dcastillo (Post 893231)
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.

dcastillo 04-07-2012 06:08 AM

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

beenthere 04-07-2012 06:30 AM

Could have loose insulation in the blower compartment, that is blocking air flow.

dcastillo 04-07-2012 06:56 AM

to check that I would need to remove the blower and look up, right?

beenthere 04-07-2012 07:38 AM

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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