Central Air, Air Condition Troubles?

Question

hello, I'm having a central air , air condition trouble.
When I turn the thermostat too cool, the fan turns on, the outside condensor spins the fan, so everything turns on.

Problem is no cold air out of the vents in the house.

I went to check the condensor while it was running, INstead of blowing out warm air, it is blowing out cool air.

Any Ideas?

Actually whats is the heat pump and what is a 3,4,5 wire system for the thermostat.
When I go outside the outside unit is on, which includes the fan. The thing is the fan instead of blowing warm air from the top, it is blowing cool air. When I check the 2 pipes going into the house, they are both the same temperature. No condensation on any of the pipes. i know the small pipe should be warm to touch and the larger should be cold with even some condensation. I played around with the thermostat, that looks okay. What to check guys?

I guess the outside unit is the compressor not the condensor, sorry.

How would I know if the compressor is running or not, I mean the outside unit seems to be running since it's fan is on.

Answer 1

Your condenser fan and compressor normally will come on together. However, if you have compressor problems, your condenser fan will run by itself that sounds like the most likely problem. If your machine never worked from day one, you could have any number of problems, but it sounds like it did work and now you're having problems. If that's the case, you can all but rule out a miswiring situation. The wiring was probably fine from the beginning when it ran and I'm sure no one touched it. If you know a little about electrical work, you may be able to troubleshoot it yourself. You should open the outdoor unit and take an amperage reading on the compressor. If you're getting an amperage reading close to the LRA rating on the nameplate, you have what is called a locked rotor, you will need to change your compressor. You would know also because the compressor will be really hot if it had a locked rotor. If you don't get any amperage, check to see if you have any voltage at the compressor terminals. If not, trace the wires back. You may have a faulty contactor. If your contactor is getting its control voltage and not closing, you need to change the contactor. If it's not getting control voltage, trace the power back to the thermostat. However, normally the compressor and condenser fan are tied into the same contactor which tells me that it will most likely be the compressor itself, burned wiring on the compressor, a bad compressor heat overload, or a bad start capacitor. Check these things one at a time. If you have done some sort of electrical work in the past or are familiar with electrical components and their operation, you may want to try this yourself. If you are not sure what I'm talking about, it would really be safer to call a technician. Just remember that the more details you give the technician the faster he can diagnose the problem. This will help keep your costs down.

Answer 2

when you say condensor, do you mean the outdoor unit?? if you are checking the evaporator on the inside of the closet or attic then it is doing what it was designed to do?? now if the outdoor unit is blowing cool air then it sounds as if the unit could be iced over by low refrig. or the compressor is not working. if the compressor isnt working then its either the starter windings are bad or the start capacitor is shot??? also is this a heat pump?? if so make sure you have the t-stat set to cool and not heat. in the heat mode a heat pumps outside unit actually becomes the evaporator and the indoor unit becomes the condensor via
a 3-way valve reversing the flow of freon. if the probelm is electrical my suggestion is to pay someone to troubleshoot! working on 240volts is dangerous and stupid for a novice!!

Answer 3

even if the outside condesor fan is running it doesnt always mean that the compressor is running. there are several reasons that it is not working the most common being that it is low on freon, it could also be a power problem where there is not enough voltage getting to the unit, most require 220 volts the fan being only 110. if the fan is putting out cool air it isnt taking any heat out of the system. as far as the 2 lines go the small one, high pressure should be hot to touch and the larger one, low pressure should be cold. the schader vavle is located where these 2 lines enter into your outside condensing unit

Answer 4

You need to call a service person sounds as though you have a serious problem any thing from a bad compressor to out of refrigerant. depending on the type of unit you have. Most heat pumps have a low pressure switch that will shut the compressor off when it becomes low on refrigerant this could be your problem. Good luck

Answer 5

Underneath you furnace is a set of coils, this is where the cool air comes from not outside. If you don't change your furnace filters on a regular basis the coils in the bottom of your furnace clog up and instead of cooling the air as it go though[ the air can't get though like it should] the coils freeze shutting down the cool air transfer, and your register blow warm air. sometimes hard to guess because coils thaw out sometimes before you can get furnace open. Your coils may be clogged

Answer 6

We have ours serviced every year before the summer season.... It could have a leak and need freeon... It could also be the compressor....You need to have someone come out and check it, and you would be surprised how long you can keep those things running... we kept our old one going for 27 years.... Good Luck...

Answer 7

the outside unit is called the condensor, it has the compressor in it.

Answer 8

Feel the compressor to see if it is running. If it is not, you have eiither an electrical component problem or a bad compressor. Based on what you are saying, thats what I would check

Answer 9

It's almost for sure the compressor. If it was the freon, it would still work, just not very good.

Answer 10

Either there is a problem with the heat pump, or your thermostat has heat & cool backwards.