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Posted by mattebury1@comcast.net on March 26, 2006, 11:57 am
I have replaced the blower motor on my Trane Heat Pump system 4 times
in as many years. This was a new home system and the first motor went
out about 6 months after install. The technician said it was a fluke
and since it was under warranty, I was not very concerned. A little
over a year latter, it went out again. I called the original
installation company and asked why this was happening. They said it
was probably due to a dirty air filter. I assured them that this was
not the case as the filters are changed regularly. Since now the unit
was out of warranty, it would cost me $500 to replace the motor. I
replaced it myself with a slightly more powerful motor (from =BD to =BE
horse) and that motor lasted almost 2 years. Well now I'm on my 4th
motor. The air coming from the registers is very loud; much louder
than anyone else's home I've been in. I don't know if this is
related or not. What could be going on here? Thanks for any help.
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Posted by CJT on March 26, 2006, 12:24 pm
mattebury1@comcast.net wrote:
show/hide quoted text
> I have replaced the blower motor on my Trane Heat Pump system 4 times
> in as many years. This was a new home system and the first motor went
> out about 6 months after install. The technician said it was a fluke
> and since it was under warranty, I was not very concerned. A little
> over a year latter, it went out again. I called the original
> installation company and asked why this was happening. They said it
> was probably due to a dirty air filter. I assured them that this was
> not the case as the filters are changed regularly. Since now the unit
> was out of warranty, it would cost me $500 to replace the motor. I
> replaced it myself with a slightly more powerful motor (from ½ to ¾
> horse) and that motor lasted almost 2 years. Well now I'm on my 4th
> motor. The air coming from the registers is very loud; much louder
> than anyone else's home I've been in. I don't know if this is
> related or not. What could be going on here? Thanks for any help.
>
What's the failure mode? Do they burn out? Bearings freeze up?
Blower motors should last 10's of years IMHO.
A three-quarter-horse motor seems awfully large for a blower.
Maybe you should be using a smaller, rather than larger, motor --
one that wouldn't use as much energy and therefore wouldn't get as hot.
--
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Posted by m Ransley on March 26, 2006, 12:50 pm
Im no hvac pro but ive heard improper duct sizing, to small, can stress
a blower. It would come under an improper install issue, duct sizing.
Get someone else out but first call trane for advise. To low a voltage
is bad for AC motors,
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Posted by mattebury1@comcast.net on March 26, 2006, 12:53 pm
They burn out.
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Posted by CJT on March 26, 2006, 2:15 pm
mattebury1@comcast.net wrote:
show/hide quoted text
> They burn out.
>
Then they must be getting too hot (unless there's a design flaw
in the motor, which seems unlikely, especially since you've tried
more than one model). That can be because they're overloaded, or
because they're getting too high a voltage (e.g. due to power surges),
or because they're not getting adequate ventilation. I doubt the
first, especially since you said you upsized. When you replaced the
motor, did you also replace the capacitor? You should have. I'm not
familiar enough with the Trane to know about how the motor is
ventilated, but upsizing the motor could have worsened the effects
of any shortcomings there.
--
The e-mail address in our reply-to line is reversed in an attempt to
minimize spam. Our true address is of the form che...@prodigy.net.
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> in as many years. This was a new home system and the first motor went
> out about 6 months after install. The technician said it was a fluke
> and since it was under warranty, I was not very concerned. A little
> over a year latter, it went out again. I called the original
> installation company and asked why this was happening. They said it
> was probably due to a dirty air filter. I assured them that this was
> not the case as the filters are changed regularly. Since now the unit
> was out of warranty, it would cost me $500 to replace the motor. I
> replaced it myself with a slightly more powerful motor (from ½ to ¾
> horse) and that motor lasted almost 2 years. Well now I'm on my 4th
> motor. The air coming from the registers is very loud; much louder
> than anyone else's home I've been in. I don't know if this is
> related or not. What could be going on here? Thanks for any help.
>