I have 3 central carrier hvac systems for my house.  On the outside 
condenser for one of them the fan has gotten quite noisy.  In fact it was 
initially frozen in  the beginning of the season.  I got it going again. 
The fans motors are mounted upside down in the top of the unit so you can't 
see whether there is a spot for oil without taking the top grill off.  I 
figured I would ask to see whether these fans take oil before I take it 
apart.  And before anyone asks me about maintenence..... they were all 
checked out last year by a reputable HVAC company but if they take oil 
apparently the guy didn't bother lubricating them. 

Art wrote:

>I have 3 central carrier hvac systems for my house.  On the outside
>condenser for one of them the fan has gotten quite noisy.  In fact it
>was initially frozen in  the beginning of the season.  I got it going
>again. The fans motors are mounted upside down in the top of the unit
>so you can't see whether there is a spot for oil without taking the
>top grill off.  I figured I would ask to see whether these fans take
>oil before I take it apart.  And before anyone asks me about
>maintenence..... they were all checked out last year by a reputable
>HVAC company but if they take oil apparently the guy didn't bother
>lubricating them.

I had a noisy fan on my AC unit several years ago and oiled it myself.
I didn't see any places to put oil in so I took the blade off and
dripped oil down the motor shaft and let it seep in for a few hours.
Neven made any more screeching noises.

"Ralph Mowery" <r...@earthlink.net> wrote in message 
news:f...@earthlink.com...
>
> "Art" <b...@mindspring.com> wrote in message 
> news:aZWdnSPL-_r...@earthlink.com...
>>I have 3 central carrier hvac systems for my house.  On the outside 
>>condenser for one of them the fan has gotten quite noisy.  In fact it was 
>>initially frozen in  the beginning of the season.  I got it going again. 
>>The fans motors are mounted upside down in the top of the unit so you 
>>can't see whether there is a spot for oil without taking the top grill 
>>off.  I figured I would ask to see whether these fans take oil before I 
>>take it apart.  And before anyone asks me about maintenence..... they were 
>>all checked out last year by a reputable HVAC company but if they take oil 
>>apparently the guy didn't bother lubricating them.
>>
>
> They may or may not take oil.  I had a Trane installed about 2 years ago 
> and the owners manual says the motors do not need oiling.
>
>
> A friend had been paying for service for about 5 years and noticed the air 
> flow was very low.  Turns out he had an electronic filter and while that 
> was getting serviced, someone had left in the old paper/fiber type filter 
> all those years.  That thing was really clogged.
>
He is lucky no damage was done. 

"Art" <b...@mindspring.com> wrote in message 
news:aZWdnSPL-_r...@earthlink.com...
>I have 3 central carrier hvac systems for my house.  On the outside 
>condenser for one of them the fan has gotten quite noisy.  In fact it was 
>initially frozen in  the beginning of the season.  I got it going again. 
>The fans motors are mounted upside down in the top of the unit so you can't 
>see whether there is a spot for oil without taking the top grill off.  I 
>figured I would ask to see whether these fans take oil before I take it 
>apart.  And before anyone asks me about maintenence..... they were all 
>checked out last year by a reputable HVAC company but if they take oil 
>apparently the guy didn't bother lubricating them.
>

They may or may not take oil.  I had a Trane installed about 2 years ago and 
the owners manual says the motors do not need oiling.


A friend had been paying for service for about 5 years and noticed the air 
flow was very low.  Turns out he had an electronic filter and while that was 
getting serviced, someone had left in the old paper/fiber type filter all 
those years.  That thing was really clogged.

On Mon, 20 Apr 2009 14:35:26 -0400, "Art"
<b...@mindspring.com> wrote:

>I have 3 central carrier hvac systems for my house.  On the outside 
>condenser for one of them the fan has gotten quite noisy.  In fact it was 
>initially frozen in  the beginning of the season.  I got it going again. 
>The fans motors are mounted upside down in the top of the unit so you can't 
>see whether there is a spot for oil without taking the top grill off.  I 
>figured I would ask to see whether these fans take oil before I take it 
>apart.  And before anyone asks me about maintenence..... they were all 
>checked out last year by a reputable HVAC company but if they take oil 
>apparently the guy didn't bother lubricating them. 


I doubt any hvac motors take oil anymore.  It is likely time to
replace the motor.  If you're lucky you can pull the motor and find a
parts place where the guy behind the counter knows his stuff and can
sell you something that'll work, even on a Saturday morning.  The job
is quite simple, just be sure to get the blade on tight enough.