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Home > Archive > Home Repair forum > June 2007 > Problems central air
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Problems central air
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| Nosiris_b@yahoo.com 2007-06-13, 5:25 pm |
| The Blower fan on my A/C will not run in cool mode, but if I turn on
the furnace it starts up fine.
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| Charles 2007-06-13, 8:25 pm |
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<Nosiris_b@yahoo.com> wrote in message
news:1181771299.594971.174490@i13g2000prf.googlegroups.com...
> The Blower fan on my A/C will not run in cool mode, but if I turn on
> the furnace it starts up fine.
Is the compressor starting up (the outside unit)?
Might be a thermostat problem.
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| Nosiris_b@yahoo.com 2007-06-13, 8:25 pm |
| On Jun 13, 6:29 pm, "Charles" <charlesschu...@comcast.net> wrote:
> <Nosiri...@yahoo.com> wrote in message
>
> news:1181771299.594971.174490@i13g2000prf.googlegroups.com...
>
>
> Is the compressor starting up (the outside unit)?
>
> Might be a thermostat problem.
yes the outside unit is starting up.
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| Charles 2007-06-13, 8:25 pm |
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<Nosiris_b@yahoo.com> wrote in message
news:1181775162.378709.13810@q19g2000prn.googlegroups.com...
> On Jun 13, 6:29 pm, "Charles" <charlesschu...@comcast.net> wrote:
>
> yes the outside unit is starting up.
OK, then the thermostat is working. The blower works in the heat mode. A
controller problem would be my guess. Should be repairable at a reasonable
cost. Some things you can check are the temperatures of the refrigerant
lines into and out of the compressor.
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| talkinggoat 2007-06-13, 8:25 pm |
| Make SURE that your compressor is working, not the fan for the
compressor. If you can't distinguish the difference, find the 2 copper
lines running into the outside unit. One should be cold, the other
should either be warm, or ambient. It should not be cold. If one of
the 2 lines is not cold, then your compressor is not working. If
that's the case, you should check the controller. Some a/c units have
a breaker attached to them. Check the wiring schematic to see if yours
does. Write back.
On Jun 13, 6:09 pm, "Charles" <charlesschu...@comcast.net> wrote:
> <Nosiri...@yahoo.com> wrote in message
>
> news:1181775162.378709.13810@q19g2000prn.googlegroups.com...
>
>
>
>
>
>
>
> OK, then the thermostat is working. The blower works in the heat mode. A
> controller problem would be my guess. Should be repairable at a reasonable
> cost. Some things you can check are the temperatures of the refrigerant
> lines into and out of the compressor.
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| Joseph Meehan 2007-06-13, 8:25 pm |
| Charles wrote:
> <Nosiris_b@yahoo.com> wrote in message
> news:1181775162.378709.13810@q19g2000prn.googlegroups.com...
>
> OK, then the thermostat is working. The blower works in the heat
> mode. A controller problem would be my guess. Should be repairable
> at a reasonable cost. Some things you can check are the temperatures
> of the refrigerant lines into and out of the compressor.
I wonder if the the speed may be different for each and one speed is
out.
--
Joseph Meehan
Dia 's Muire duit
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| Mark Lloyd 2007-06-13, 8:25 pm |
| On Wed, 13 Jun 2007 19:09:07 -0400, "Charles"
<charlesschuler@comcast.net> wrote:
>
><Nosiris_b@yahoo.com> wrote in message
>news:1181775162.378709.13810@q19g2000prn.googlegroups.com...
>
>OK, then the thermostat is working.
I know my thermostat has separate contacts for compressor and fan (for
heat the furnace controls the fan, not so with cool). One set of
contacts could be good, but not the other.
> The blower works in the heat mode. A
>controller problem would be my guess. Should be repairable at a reasonable
>cost. Some things you can check are the temperatures of the refrigerant
>lines into and out of the compressor.
>
--
Mark Lloyd
http://notstupid.laughingsquid.com
"DISCLAIMER If you find a posting or message
from me offensive, inappropriate, or disruptive,
please ignore it. If you don't know how to
ignore a posting, complain to me and I will
demonstrate."
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| Nosiris_b@yahoo.com wrote:
> The Blower fan on my A/C will not run in cool mode, but if I turn on
> the furnace it starts up fine.
>
So something is broken -- could be the thermostat, could be the relay,
could be the wiring, could be one of the motor windings (furnace blower
is usually a different speed from AC blower). Get in there with a VOM
and diagnose it, or get somebody who knows how.
--
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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| Nosiris_b@yahoo.com 2007-06-14, 3:25 am |
| On Jun 13, 9:48 pm, CJT <abujl...@prodigy.net> wrote:
> Nosiri...@yahoo.com wrote:
>
> So something is broken -- could be the thermostat, could be the relay,
> could be the wiring, could be one of the motor windings (furnace blower
> is usually a different speed from AC blower). Get in there with a VOM
> and diagnose it, or get somebody who knows how.
>
> --
> 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.
I just replaced the thermostat so I know thats not what it is.
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| On Wed, 13 Jun 2007 21:52:58 -0700, Nosiris_b@yahoo.com wrote:
>On Jun 13, 9:48 pm, CJT <abujl...@prodigy.net> wrote:
>
>I just replaced the thermostat so I know thats not what it is.
No, you don't.
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| Joseph Meehan 2007-06-14, 9:25 am |
| Nosiris_b@yahoo.com wrote:
> On Jun 13, 9:48 pm, CJT <abujl...@prodigy.net> wrote:
>
> I just replaced the thermostat so I know thats not what it is.
That logic has caused a lot of frustration. The replacement could be
bad or the wiring could be wrong.
--
Joseph Meehan
Dia 's Muire duit
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| Nosiris_b@yahoo.com wrote:
> On Jun 13, 9:48 pm, CJT <abujl...@prodigy.net> wrote:
>
>
>
> I just replaced the thermostat so I know thats not what it is.
>
.... assuming the new one isn't defective, that it is compatible with
your system, and that you installed it properly
--
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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