I have a 25 year old General Electric central air conditioner.
Today, the weather here in N.J. is extremely warm and humid. It was
about 80º in the house. I noticed that when I set the thermostat to
cool to 77º the air which was coming from the vents wasn't especially
cool. I replaced the filter which was a bit clogged hoping that would
help but it didn't seem to make a difference.
Anyone have an educated guess?
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I'd suggest turning the thermostat down a bit more to make sure that
it is truly calling for cooling.
Check the condenser unit outside to make sure it is running and that
the airflow is not blocked/reduced by overgrown grass, bushes, etc.
Check the fuses/ circuit breakers....there's often breakers in the
main service panel as well as one outside by the condenser.
Check the pipes running from the outside unit into the furnace plenum.
The larger pipe should be cold to the touch but no ice/frost visible.
The other pipe will be warm.
You could try cleaning the A-coil. It is a bit messy, and may require
you to cut an access hole in your furnace with tin snips. Do a search
on "clean A-coil".
If the airflow is not cool at the room registers, I would call in an
Mr. Fixit eh
The clogged filter could have caused liquid slugging of the compressor
which would damage the valves - causing it to lose efficiency.
High humidity will result in much less sensible temperature drop out the
supply air diffusers.
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You should read the hilarious reply a customer of mine got from Trane.....
Homeowner requested a tear down to see why her 6 year old compressor failed
in her package unit. Red Tag teardown indicated locked rotor as our field
diagnosis had. They faulted scoring indicating a floodback as well as low
oil level in crankcase. They went on to say that most likely a leak had
occurred and the unit had operated with low charge, thus causing oil loss at
the compressor due to the low refrigerant velocity. Wait, they didn't stop
there, they added that then the unit was likely overcharged after the leak
was repaired causing the floodback that locked up the Climatufffffffffff.
This was a new customer, we checked the unit completely when replacing the
compressor including the ductwork sizing, coil cleanliness, etc. All were
A-OK. She has never had the unit worked on....... I know - PM - but she
keeps the filter clean and the unit is well maintained (coils cleaned, etc.)
Needless to say, they denied a desire to pay for the year out of warranty
compressor....... She kept telling the tech, I bought a Trane because I
heard they were the best...... Problems are available in all brands! :-)
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