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Re: ckl60-1l outside fan runs good,compressor do not run
Reasons for icing up are dirty filters,dirty indoor evap coil or low on refrigerant. Check these. Your compressor is probably overheated. Let it go for a couple of hours if you are in a hurry. Run a water hose over it. Rus
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Check the air filter and if it is dirty, replace..
Turn equipment off and let the ice melt.
After ice melts, place a/c in cooling mode and set the thermostat to 3 degrees below room temp display.
The indoor unit fan should start blowing cold air immediately and then turn off once the room temp drops one degree below the cooling temp setting.
If the indoor unit does cycle off, check the outdoor unit and make sure it turns off at the same time.
If the outdoor unit continues to run and the indoor fan is not running, the indoor unit will ice up.
A defective compressor relay that is stuck in a closed position will cause icing of the indoor unit because it keeps the compressor running when it should turn off with the indoor fan.
Do you have an error code being displayed on the controller?
Is there an led light that is flashing on the indoor unit?
Another possibility causing the indoor unit to ice up is if the freon in the system starts to get low.
Make sure the ice has all melted for this next check.
Pretty easy to check without special tools.
If the air filter is clean and there is no dust/ dirt blocking the fins on the indoor unit, turn a/c back on to cool and check that the indoor unit fan comes on and is blowing air good.
Once everything seems to running good go to the outdoor unit.
There will be two lines with black rubber insulation covering them.
Peel back the insulation three inches on each line and observe the copper lines.
If either line starts to frost up the a/c system is most likely low on refrigerant.
Another cause of indoor unit icing could be that the aluminum fins behind the air filter are clogged with dust or other foreign material.
This would block the air that must be pulled in causing the indoor unit coil to become too cold due to lack of air flow and it will ice up.
Operating the cooling system when the outdoor temperature is below 60 degrees can cause the indoor unit to ice up also.
Florida certified a/c contractor. 30 years experience.
Hope this helps.
Are you talking about a heat pump? Is the compressor and fan running in the outside unit? What is the outside temp? If the compressor is not running it could be a bad capacitor or bad compressor. If the lines are icing up it could be a low charge.
As with the simplest way to thaw ice is with heat.
If you are running this unit in cooling and have ice outside, then you most likely have a freeze up inside as well. If this is a heat pump unit, then frost is normal during operation, however, ice build-up is an indication of a problem.
There are 2 effective ways to remove the ice build-up. The first is the simplest. Get your water hose and hose it down. Be sure to turn off the breakers to the unit and avoid spraying the electrical compartment. If you have the ability to hook the hose into a hot water line, then this process with be extremely fast. Let the unit sit for about 20 minutes to dry out and turn it back on.
The second can be a little more complicated if your not tech savoy. You can turn the system on in the cooling mode. This will make the outdoor coil the condenser section. Then, either block the airflow through the coils with an object, put an object over the fan to increase pressure, or if you can, disconnect the fan so it does not run. This method is essentially the same as a defrost cycle.
As with any failure, you can fix the problem at hand, but it will return. After you get past this, your real challenge will be determining what caused the freeze-up.
If you were running your system in cooling already, then you will need to ensure the system has de-iced on the inside as well.
Your unit will only harvest when your thermostat is satisfied. If you have heavy frost you need to defrost the unit. If no frost then make sure the fan is running by the compressor. If the fan isnt running then the compressor is going off on overload. Or it could be the fan running but the compressor is not. If thats the case you will need a service tech.
Check and see if it is froze up. Check big line at outside unit for ice. check filter and replace as needed. Check outside fan to see if it is running. Wash out outside coil If fan and compressor are running and has hot small line at outside unit. If not froze up and coil is clean you will need to call in a pro. If compress over heated you may need to wait for it to restart if coil was dirty. Again make sure out door fan and or unit is running and clean.
I am not exactly sure as to the type of unit you have. If it is a ductless split system (inside unit on the wall, never seen Lennox make one) you could be low on charge, the metering device to drop the refrigerant pressure is in the outdoor unit. If this is a whole house system, you may have a restriction in the outdoor section somewhere. If you look into the unit while it is running, try to find a filterdrier. It is a cylinder soldered into the small line. You can also see exactly where the ice starts, that is where your restriction is. Let me know what you find out. seth
If you have ice on the Line you are iced up. If coil is iced no air can get thru. Now First. Turn of ac and turn fan to on posotion. That will thaw unit. Let it run 45 minutes. That should do it. If the fan is not running you amy have a bad fan relay. One of the reason iced up unit is dirty evap, coil inside. Try to thaw it out first. You can clean the coil with a stool brush. Does not damage the coils. Good luck