Problems central air
 

The Blower fan on my A/C will not run in cool mode, but if I turn on
the furnace it starts up fine.

Problems central air
 

wrote in message
oups.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.

Problems central air
 

On Jun 13, 6:29 pm, "Charles" wrote:
wrote in message

oups.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.

yes the outside unit is starting up.

Problems central air
 

wrote in message
ups.com...
On Jun 13, 6:29 pm, "Charles" wrote:
wrote in message

oups.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.

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.

Problems central air
 

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" wrote:
wrote in message

ups.com...

On Jun 13, 6:29 pm, "Charles" wrote:
wrote in message

groups.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.

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.

Problems central air
 

Charles wrote:
wrote in message
ups.com...
On Jun 13, 6:29 pm, "Charles" wrote:
wrote in message

oups.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.

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.

I wonder if the the speed may be different for each and one speed is
out.

--
Joseph Meehan

Dia 's Muire duit

Problems central air
 

On Wed, 13 Jun 2007 19:09:07 -0400, "Charles"
wrote:


wrote in message
oups.com...
On Jun 13, 6:29 pm, "Charles" wrote:
wrote in message

oups.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.

yes the outside unit is starting up.

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."

Problems central air
 

Problems central air
 

On Jun 13, 9:48 pm, CJT wrote:
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 .

I just replaced the thermostat so I know thats not what it is.

Problems central air
 

On Wed, 13 Jun 2007 21:52:58 -0700, wrote:

On Jun 13, 9:48 pm, CJT wrote:
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 .

I just replaced the thermostat so I know thats not what it is.

No, you don't.

Problems central air
 

Problems central air