A/C unit compressor shuts off

If the unit is running in cold weather than there is ice building up on the coils located outside. This is normal in that the unit is running in heat pump mode heating inside and cooling outside, After the unit detects the ice build up it briefly reverses the cycle heating the outside coils melting(defrosting) the ice which you observe as water on the pad.

The video gives you an example of the defrost cycle!
2012 Trane XL15i Heat Pump Defrost Cycle Steam Show

That's a complicated system that needs a qualified technician to service it. Lots of people can install them and they run fine, for a few years. Your indoor unit, operating on 2 heat elements, will feel like its blowing cold air even though its heating, just not so well. And not like you are accustomed to. Each element (5kw)=22.7amps, on average. So 3 elements operating should trip a breaker. Its probably been operating on 2 heat element plus the heat pump. And now you have trouble with the heat pump. If you can't TRUST the guys working on your equipment, try someone else. A second opinion. Normally a 3 or 4 ton unit will have 15kw heat installed, heatpump or not. 5 ton, 20kw. If yours is a 3-4ton, cooling, the 100amp(or normally two 60 amp) breaker should have been installed upon equipment change out. If yours is blowing cold all the time, something is wrong with your heatpump. The electric heat inside operates only when the heatpump can't keep up(real cold outside), the heatpump is in defrost(then it's actually in cooling mode), or if you have the tstat in aux/em. heat. Try a local trane dealer? Of a technician with 15-20 yrs under their belt. A trane dealer should have trane tech support also. BIG HELP!!!

If your refrigerator is a few years old it may have an electromechanical timer to control the defrost cycle. With age and/or lots of dust the timer motor can wear out or the switch contacts can get stuck.
Behind the grill below the door there should be a small black box with several wires coming out of it. On the front of the box there is a small (dime sized) round disk with a slot in it. This is the defrost timer, a 24-hour clock mechanism which switches the cooling unit off and the defrost heaters on for 15 or 20 minutes every 24 hours (approximately). Insert a small insulated screwdriver into the slot and turn it slowly clockwise until you hear a click. The compressor and fan(s) should turn on (if they aren't running already) and the defrost heaters should turn off. If you continue turning the timer disk you should hear another click and the compressor & fans will shut off and the heaters turn on. Stop turning the disk at this point. Wait a couple of minutes and then turn the disk a few degrees farther (5 degrees represents about 20 minutes). You should hear a click and the compressor starting up again.
If there is no change and the heaters still seem to be on, then you may need to replace the timer (it should unplug from the wiring harness). A Home Appliance Parts store should be able to provide you with a compatible replacement timer.

Than it's not wired correctly. Did you splice the motor wires? Black on left, common to cap which should be the right from contactor and fan which I think, without looking, is brown. purple common...

If you need further help, reach me via phone at https://www.6ya.com/expert/thomas_092728000e6acb79

You have a mess, You need a complete new duct system and new equipment.......

You have a 2 1/2 ton AC which needs 1000 cfm of air to do the job. You need a supply trunk line 8 by 24 inch with takeoffs of a Min of 6" round pipe to each register which will delvery 100 cfm per run 4" will only delivery about 30 cfm per run.... and then you also need a 10 by 24 return Duct to the furnace ....

So that is why the heat exchanger burned up and the that is why the Compressor is noisy because you was flooding back liquid to the compressor... All because of air flow....
If you replace the AC or Furnace without replacing the Ductwork you will burn them up also....

Sorry for being so Frank......

Please help us by observing and giving us a few more details:

When the Air Conditioner first comes on, do you hear the compressor start up?
does the room air fan come on?

This time of year, the unit must not be in a very HOT environment, right?

Is it possibly it is too cool outside?--

Please give us some temperatures (in and out)

and listen for any other clues-- Like: A relay clicking -- or a compressor trying to start, but is stalled, or dimming of the lights, etc. etc.

We need more clues.
Mack B

trane has been the best for me and I love there warrenty

You can wait just buy a capaciter start system theat will override the old start capaciter, this is a common problem for all ac systems. just bu the ac start replacement and yo should be good to go for a couple more years. and if you want a reference page let me know where and I will give it to you.

my friend if you open the tv carefully look to see if the tube itself has light, or if you have high voltage i coulbe many different things.wish luck!!



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