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sounds like it is either low on Freon or the compressor is going out. The blowing ice cold is an indicator that it may be freezing up because the low Freon. when it stops blowing cold, turn it to fan only mode and see if it gets colder again. If that is the case then the unit is low on freon and freezing up. I know that sounds confusing but that is how AC works. The low freon pressure means the gas is expanding too fast and the air flow cannot take up the cold from the evaporator fast enough. Turning the compressor off and keeping the fan on will alow the room air to take up the cold.
When you say the 'condenser' stopped running - I'm 'assuming' you are talking about the outside unit, and I'm also 'assuming' that when you say it stopped running you mean 'nothing' runs on the outside unit - fan motor OR compressor. The fan motor will drown out the compressor running noise which is a 'low rumbling' sound - often not heard by the layman because of the noise the fan motor puts out.
Assuming you are talking about the outside unit and 'nothing' is running either fan motor or compressor then you might be 'in luck.' Because the most likely reason for the outside unit to be totally off will be a 'blown fuse' or a 'tripped breaker.' The good news is that in 'hot weather,' especially the kind of hot weather that has been present this summer (especially in the south) - blowing a fuse or tripping a breaker is not necessarily an expensive repair.
Indeed, it's not uncommon for a AC unit to blow a fuse (or trip a breaker) on occasion, although it must be noted that doing so is also is sign on something seriously wrong with your AC, i.e. a fan motor breaking down electrically or even a Compressor, both being expensive items to replace.
But, as I said, it's not uncommon for a fuse to blow once in awhile.
I would check my fuses (and breaker) and see if this is what has happened.
If you have fuses (usually located outside close to the condenser) and have no way to check them (you check them with a ohm meter looking for continuity) - then just 'replace' them with new ones. Note: always put 'time delay/dual element' fuses back in - even if the ones that are in there now are 'one time' fuses. 'Time delay' fuses do just what they say they will do - (they hold for just a second or two during that initial start up (of the compressor) without blowing).
If a blown fuse/tripped breaker is your problem then "most" of the time the AC will run ok and you will not have any more problems.
However, if after replacing the fuses and turning the AC back on - the fuse(s) blows instantly, or a short period thereafter (say a few minutes or an hour) then you probably have a problem that is causing it - i.e. the fan motor or compressor is going bad.
Note: one thing that you can fix that might be causing the fuse to blow is a dirty condenser. So, check the condenser coil (think of it like a car's radiator). It 'must' be clean to run properly and when it gets 'really dirty and clogged with dirt it will cause high head pressure and can cause the unit to blow fuses and trip breakers.
If compressor stops in middle, check the following. 1.Thermostat setting must be minimum +3 degree than your room temp 2. Check it's in heat "mode" 3. Check indoor and outdoor coils are clean. 4. Check fan motor is working alright. 5. Outside sensor and room air sensor is placed correctly. 6. Gas pressure is o.k 7.Check compressor is overheated, even all the above is o.k.
See if you can reposition the thermister on the facing of the evaporator coils. That could be it or the thermister might be bad. They don't use copper/mercury sensing bulbs these days. They use these cheap thermisters.
Two things; outside does the compressor try to come on? If not you may have a switch\Thermotat problem. Also make sure the breaker to the outside unit hasn't tripped. If it has tripped there may still be a problem after you turn the breaker back on. If it's only the fan that's not coming on outside you will need a new capacitor or fan motor and compressor(if the fan motor is replaced you should have a new capacitor also. If it has been intensely hot your unit might have just gotten overworked. Then resetting the breaker is all that is needed. If you have continuos resettings you MUST call a qualified HVAC Tech.
It sounds like you have a unit called a heat pump. When a heat pump unit is in cooling mode the outside unit blows hot air and the inside unit blows cold air. If the outside unit is blowing cold then the indoor unit is most likely blowing room temperature or warm air. It sounds like the thermostat could be controlling incorrectly or you could have a failed reversing valve which is the device that switches the unit from heating to cooling mode.