I've got a Trane central air unit for my home (dual zone), and the upstairs
unit is not putting out cool air. I checked the compressor unit outside, and
there is ice on the distribution pipes as they enter the unit. Also, when
the fan is running no hot air is being pushed out of the top. The downstairs
unit works fine; no ice on the lines and the compressor fan blows hot air to
the outside (inside it keeps nice and cool). Both units are original, about
10 years old.
Obviously if it is a simple fix I don't want get suckered into buying a
whole new compressor. But since I know next to nothing about cooling systems
I need to know possible causes for the problem and likely price ranges for
what I should expect to pay for repair.
Can anyone help?
Turtle hit it right on the head.
The only homeowner repair I reccommend is changing the filter. You may be
able to replace a motor on a furnace, but I don't recommend it( I don't know
how handy you are).
This is Turtle.
There is three things that come to mine here but I can't see it from here. When you
have ice on the suction line [ bigger copper
line ] you have this.
1) Poor air flow across the evaperator coil inside at the coil. This can be dirty
evaperator coil / dirty blower wheel / furnace
or air handler motor not fuctioning correctly or running fast enough / too many air
register in each room in your home closed off /
and last Dirty filter. All of these are called Air flow problem. Most often this is
2) Blockage in the freon system or flow of freon . This can be a bad expanion valve
or a plugging up flow rater at the evaperator
coil inside the house or a drier or strainer at the evaperator coil where the freon
enters. This would be the cause in about 1 in a
3) You are low on freon to a point of running out and it will ice up before you get
to a empty level. Now this would be the second
most common thing that would be the cause.
Now I do not see a compressor change out with a problem like this. I do see a fixing
of a leak of freon somewhere or cleaning of a
evaperator coil or changing of a blower motor. Now a compressor change is just out of
the picture as i would see it here.
Outgoing mail is certified Virus Free.
Checked by AVG anti-virus system (http://www.grisoft.com ).
As a follow-up: I contacted a local company and they sent a guy out (at
10:00pm last night no less - they were running *way* behind that day).
Freon was a couple of lbs. low, so he added to that. That may indicate a
slow leak in the system, I'll have to watch that. The other problem was that
the vents to the air conditioner houseing were clogged. I was looking from
the inside out, through the top. But shining a flashlight from the outside
up into the vents showed debris in there. So I hosed that out this morning.
Charge for the service call ($60) plus two lbs. of Freon @ $17/lb. was $94.
Spent my time talking with the nice fellow that came out, learned some new
things about heating/cooling.
I will need to put either gravel or possibly square slabs out around the
units. They are under some trees which drip and cause splashing from the
ground (very little grass due to shade) up into the unit vents.
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