Air from vents is not cold.

check thermostat turn off system wait 3 to 5 minutes turn on to cool and turn thermostat to coolest setting if no compressor test thermostat and compressor check filter if dirty and coil iced turn off and lit defrost and change filter if coil warm and unit running compressor internal damage or low freon

Check the refrigeration lines coming off the outside unit. One should be very cold and one relatively warm. If one is not very cold, then the compressor is not working. Usually you can hear it when it is running. The condenser fan in the outside unit should also be operating. If the compressor and fan are operating, but the refrigeration line is not cold, you probably have a refrigeration leak and have lost the coolant. You will need a service tech for the repair.

It sounds like your freezing up at the coil, which in turn, blocks airflow across coil and only a small amount of air comes out of the vents. This also explains the cold air coming from fan on the outside unit, since the system cannot absorb the heat from the inside of the house through the coil. Your air outside is usually blowing out warm to hot air because thats the heat it rejects out of your system. I would turn the thermostat to "OFF" and turn just the fan setting to "ON" instead of Auto, this thaws the system out faster. Give it time to fully thaw, make sure filters are clean, and check airflow. If airflow is back to normal, your problem is more than likely the charge of refrigerant. If you have to call a technician out, make sure the unit is not frozen at all before they get there, they would not be able to do anything with the system froze. Hope this helps and good luck!

Turn the system off on the thermostat and set the fan to "ON", this will thaw the ice faster if it hasn't already. When the system has completely thawed, which could take hours sometimes, depending on how bad it's frozen, then turn system back to "Cool" and start these checks>

1. Make sure filters are clean!
2. Make sure there is proper airflow through vents.
3. Make sure outside condenser fan motor is running.

If you have either no or minimal airflow, check the indoor blower to make sure it's working, if it is, the evaporator coil is dirty restricting the airflow. Be sure the system is thawed because the ice will also block the airflow!

If the condenser fan motor is not running, either the capacitor or the fan motor will need to be replaced.

If your filters are clean, you have good airflow through the house, and everything comes on like it should, it will most likely be the charge of refrigerant in the system is too low and you have a leak somewhere. If you have to have it charged, be sure the system is thawed before the technician gets there, he will not be able to do anything while it's froze.

Hope this helps and good luck!

Make sure the outdoor fan is running and check your air filters. Also make sure the indoor and outdoor coils are clean. If all is good then get the refrigerant charge checked.

Start the unit and go outside to see if the insulated pipe is sweating or cold, hot air should be discharging from top of outside unit. Since the breaker is not tripping, my best guess is the compressor is not operating. You might have to replace the capacitor.

If you can hear the compressor operating, then most
likely needs refrigerant

the A coil is froze up the low pressure side is too low, add freon

Hello,

If you have solid ice build up on the "big" pipe (suction line) and very little air coming out of the vents, it's more an air flow problem; Inside fan not working, dirty coil inside (evaporator) or block filter. Open the cabinet inside and take a look there first.

This should be easy to fix; if the filter is dirty, replace it. should be done every month anyway.

If the coil is dirty, depending on access there's a 50/50 chance you can clean it you're self. If you can't you will have to call a technician who will pump all the freon in the outside unit, disconnect the coil, clean it & reinstall it, that should run you $200 to $300

You say there is a little air coming out so the fan is probably working, but if not, you will to find out why the fan is not running. That's electrical, could as easy as the thermostat is not turning the fan on to replacing the fan it self.

It is possible to have frost coming back if you are undercharge (low on freon) But the conditions have to be just right. A Journeyman mechanical carrying an EPA license working under A license contractor is the minimum you need to be able to buy freon since the 90's. that's legal of coarse.

To charge a system you also need a set of gauges and you need to know the working pressure of the system depending of the freon inside.

I think you only have a block filter or a dirty evaporator, possibly a collapse duct.

Good luck

Benge

hi! there,
well we have to do something about that,if you mention of fan spin and it pushes air but no cold enough on it,this refer to blower on compressor, there is fan on outside the condenser,so we are on blower w/c does not blow enough cold air,there are factors we can check,first thermostat try to adjust thermostat to the coldest point,
observed if cold was increasing if not, 2nd have clean the filter from evaporator it may have a clogged, check evaporator if there freezing ice on bottom portion of evaporator w/c cold was coming out,have it clean,cleaning this is done by certified a/c technician,there is problem if have an insufficient cold,this is the symptom of your system was under charge lack of freon,this can check by technician w/ clamp ammeter device.the operating current should be equal to rated current on manual,inform service center about this,have a nice day don't forget to rate me.thanks's

Do you have the Economy button on? If so, and you have a large space to heat or the outside temp is very cold the unit may not be able to keep up. If this is the case the stove runs forever, trying to reduce the temp by 2 degrees every 30 minutes. This may not work for your space and outside temp.

Your ideas about the intake and exhaust are not quit right. There is a fan that pulls air from outside over the outside of the exhaust pipe (to preheat it). This fan actually pushed the combustion gasses all the way out the exhaust. The exhaust exiting should be a little hot. In very cold temps, frost can build up around the air intake, which is right around the exhaust pipe. If you see this you will need to keep it clean. It is a good idea to look at the exhaust everyday when it really cold.

Good luck,

Tom Hawkins
Bethel, Alaska
[email protected]