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Central Air Conditioner will not start smdecat 05-10-2007
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Posted by on May 10, 2007, 6:26 pm
Hello,

Recently when I went to turn on the central air I noticed that the air
coming out of the unit was not cold. It was right before I went to
bed so I didn't check the compressor outside to see if it was
running. today I had some time, and I fired up the AC and checked
outside, and noticed that the fan was not running.

I checked the breaker and flipped and a couple of times, this did not
turn it on.

I checked the high voltage and low voltage wires at the compressor and
I was getting a reading on the high voltage, but my volt detector
could not pick up a hot wire on the low voltage line.

No obvious obstructions to the fan or motor, no wire inside the unit
seemed worn or torn, and was properly connected.

I can hear a faint hum at the compressor as if a motor is trying to
run but it is not actually running.

This is a very old unit, it's a GE and I am wondering if it came with
the house when it was built in the late 70's.

Anyone have any idea what could be the cause or perhaps a start in the
right direction? I'm not sure I can afford a new unit right now..and I
can only imagine how much repairs may cost to an old unit like this.

thank you


Radiant Heat 468x60
Posted by on May 10, 2007, 6:36 pm
On 10 May 2007 15:26:27 -0700, smdecat@gmail.com wrote:

>Hello,
>
>Recently when I went to turn on the central air I noticed that the air
>coming out of the unit was not cold. It was right before I went to
>bed so I didn't check the compressor outside to see if it was
>running. today I had some time, and I fired up the AC and checked
>outside, and noticed that the fan was not running.
>
>I checked the breaker and flipped and a couple of times, this did not
>turn it on.
>
>I checked the high voltage and low voltage wires at the compressor and
>I was getting a reading on the high voltage, but my volt detector
>could not pick up a hot wire on the low voltage line.
>
>No obvious obstructions to the fan or motor, no wire inside the unit
>seemed worn or torn, and was properly connected.
>
>I can hear a faint hum at the compressor as if a motor is trying to
>run but it is not actually running.
>
>This is a very old unit, it's a GE and I am wondering if it came with
>the house when it was built in the late 70's.
>
>Anyone have any idea what could be the cause or perhaps a start in the
>right direction? I'm not sure I can afford a new unit right now..and I
>can only imagine how much repairs may cost to an old unit like this.
>
>thank you

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Posted by danger on May 10, 2007, 7:01 pm
That hum is probably the 24v contactor pulled in. Sounds like you don't have
240V to the outside unit. It's unlikely both
the compressor and condenser fan are bad. I would check the capacitor. You
sure there is no disconnect box outside, that
might be interupting the line voltage? Hard to say unless you can take some
electrical readings. I would double check you
have 240V across your contactor, and 120v from each side to ground. Then check
to see power leaving the contactor.

Could be as simple as a dead bug preventing the contactor to fully close.
Does your tester just glow red? It should glow red on both line wires. The 2
control wires probably can't be read with
your meter.

-Canadian Cool


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Posted by Tony on May 10, 2007, 7:17 pm
Come on by new one don't be cheep skit



> Hello,
>
> Recently when I went to turn on the central air I noticed that the air
> coming out of the unit was not cold. It was right before I went to
> bed so I didn't check the compressor outside to see if it was
> running. today I had some time, and I fired up the AC and checked
> outside, and noticed that the fan was not running.
>
> I checked the breaker and flipped and a couple of times, this did not
> turn it on.
>
> I checked the high voltage and low voltage wires at the compressor and
> I was getting a reading on the high voltage, but my volt detector
> could not pick up a hot wire on the low voltage line.
>
> No obvious obstructions to the fan or motor, no wire inside the unit
> seemed worn or torn, and was properly connected.
>
> I can hear a faint hum at the compressor as if a motor is trying to
> run but it is not actually running.
>
> This is a very old unit, it's a GE and I am wondering if it came with
> the house when it was built in the late 70's.
>
> Anyone have any idea what could be the cause or perhaps a start in the
> right direction? I'm not sure I can afford a new unit right now..and I
> can only imagine how much repairs may cost to an old unit like this.
>
> thank you
>



Posted by daytona° on May 10, 2007, 9:36 pm
"Cheap Skate" not skit


> Come on by new one don't be cheep skit
>
>
>
>> Hello,
>>
>> Recently when I went to turn on the central air I noticed that the air
>> coming out of the unit was not cold. It was right before I went to
>> bed so I didn't check the compressor outside to see if it was
>> running. today I had some time, and I fired up the AC and checked
>> outside, and noticed that the fan was not running.
>>
>> I checked the breaker and flipped and a couple of times, this did not
>> turn it on.
>>
>> I checked the high voltage and low voltage wires at the compressor and
>> I was getting a reading on the high voltage, but my volt detector
>> could not pick up a hot wire on the low voltage line.
>>
>> No obvious obstructions to the fan or motor, no wire inside the unit
>> seemed worn or torn, and was properly connected.
>>
>> I can hear a faint hum at the compressor as if a motor is trying to
>> run but it is not actually running.
>>
>> This is a very old unit, it's a GE and I am wondering if it came with
>> the house when it was built in the late 70's.
>>
>> Anyone have any idea what could be the cause or perhaps a start in the
>> right direction? I'm not sure I can afford a new unit right now..and I
>> can only imagine how much repairs may cost to an old unit like this.
>>
>> thank you
>>
>
>



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