Question about Ruud Central System Air Conditioner

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Not cooling when i look at the unit outside there is ice formed on the black insulated hose

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Turn your System OFF and put the Fan switch at your thermostat in the FAN or ON position. Allow it to run like this for 4 hours minimum. Before turning the system back on, ensure the air filter(s) and coils are clean. Also make sure all of the supply registers are open. All of these items affect airflow. Improper airflow is the number one cause of an iced up evaporator coil (as indicated by your observation of ice on the black hose). If, after doing all these things, you continue to have a problem, you most likely have a refrigerant problem (not enough or a restriction). This would require paying a CFC certified electrician to diagnose and repair. Try the air filters, coils, and registers first. :-)

Posted on May 30, 2010

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Front grill


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.

I'm Robert.
Florida certified a/c contractor. 30 years experience.
Hope this helps.


Mar 18, 2014 | Fujitsu Heating & Cooling

1 Answer

Why is my subzero refrigerator (model 550 o/u) leaking?


Frost build up in that area is common, it is where the compressed gas leaves the compressor on its way to the evaporator inside the unit. The putty is put there on purpose during manufacture to insulate. Things aren't helped if you have a moist warm kitchen as the air condenses at that spot and freezes. If the fridge is in reasonable condition elsewhere and you don't wish to buy another there are a few things you can do. The area with the frost can be fixed with a can of expandable foam, or foam insulation cut to size to fully cover and insulate that area. Any condensation of the back can be fixed by covering with thin polystyrene sheet which comes in a roll. cut to size and stick with contact adhesive in blobs.

Your icemaker won't make any difference to the problem. Don't forget the water supply hose should be changed every 10 years.

If you do decide to change, one benefit is cheaper running costs. Improvements are being made all the time. Having said that, SubZero are a premium make.

Mar 10, 2017 | Sub-Zero Refrigerators

1 Answer

Why is there smoke flowing from my ventilation vents? My truck is not over heating and there is no smoke coming from the engine. I have a 97 Ford, Expedition.


You mean from the aircon vent.Your cooling unit need a good chemical wash.Ice is forming in the cooling unit, the air outside is hot thus is the cold air forming smoke from contacting the hot air.

Jun 01, 2012 | 1997 Ford Expedition

1 Answer

I have a carrier air conditioner model 38CKC024340 it cool the house sometimes, then a block of ice will form on the unit outside and it stops cooling, what could be the problem


Have you changed the air filter?

The 2 main reasons for frozen units in cooling mode 1. Not enough air flow. 2. Low on refrigerant.

You can fix #1.
#2 will require a service call.

Jun 02, 2011 | Carrier 38CKC024 Air Conditioner

2 Answers

The air conditioner is pouring water on the floor!


Sounds like your water drain line is plugged. There should be a bundle of wires tubes and a drain hose that goes through the wall to the outside unit. The water drain hose should split off outside and drain on the ground. You should check that the drain hose is not plugged or kinked somewhere. The hose must also slope downwards from the inside unit to where it drains outside. You can check if the hose is plugged by blowing into it if you can reach the hose outside. You should be able to easily blow through the tubing back into the house. I have done this with this type of unit at night (determined to get it working), and was able to get it to start draining properly. Before I got it to start draining, I had the same waterfall that you are seeing. The unit had been off all winter. Hope this helps.

May 23, 2010 | Fujitsu 24C1 Air Conditioner

1 Answer

Not cooling, water is leaking around the outside unit. plus ice has formed around hose on the unit outside. goodman model number gsh130421ac.


take a garden hose and wash the unit real good,if the unit outside cant breath this will cause it to freeze up

May 16, 2010 | Goodman CKL36AR36 Air Conditioner

2 Answers

Whirlpool freezeer making ice moist in addition of ice and the refrezerator does not cool enough. please any help.


if there is ice forming on the back wall of freezer then you have a defrost problem in the freezer,deheater,bimetal switch,defrost timer,all need to be checked-mike

Jan 24, 2010 | Freezers

2 Answers

Outside unit iced up how do de-ice


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.

Jan 12, 2010 | Heating & Cooling

1 Answer

I have a 20 year old Trane heat pump. Outside


Yes, you will want to put the unit into cooling mode to help assistance with the ice melt.

If you can, block off the outdoor coil or disconnect the outdoor fan motor. This will assist in raising the discharge pressure and temperature and thus, it will melt the ice quicker.


Or, if you have the capability, you can take a garden hose around to the unit hooked into hot water and melt the ice that way.




If your control board is messed up, why aren't you replacing it?

Jan 10, 2010 | Carrier XHB123D X/Y Series Heat/Cool Air...

1 Answer

Central Air not cooling properly


This tubbing carries the refrigerant. The small line is flowing to their inside air handler. If the line is hot it is an indication that the outside unit is not able to release the heat. The most common reason is that the coil (looks like a car radiator) is dirty or plugged. This can be cleaned with a brush or sometimes a garden hose. They do make acid type cleaners for doing this, but the use of the acids are restricted in some areas.

By the way the other black pipe should have a larger copper line behind the black insulation. That line should be cold and sweaty like a nice glass of ice tea:)

Jun 26, 2008 | Carrier 36KCARMS Air Conditioner

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