Tip & How-To about Heating & Cooling

How to tell if Compressor is working in Condensor

If your outdoor unit is operating and cooling is not a problem, then you should feel hot air discharging from the top of the unit and the insulated suction line should be cool or sweating.

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1 Answer

Related to cooling


Sounds like you have poor insulation in that room or the unit is undersized for the room it is cooling. It should not get hot quickly is there is good insulation and is big enough to do the job. Since you do not mention the age of your home/room or the size of the room, I can't be more specific. The number of turns may or may not be an issue. Depends of which of the lines are taking all the turns. Are the lines insulated? If they are overly long this could take longer to cool down but not much else if the system in full of Freon. If you do not feel cold air coming out of the unit at all and the compressor is running then check the air filter. If it is the littlest bit dirty and the unit is undersized for the room then any restriction would make it even more ineffective.

Apr 20, 2014 | LG LSC121PMA Split System Air Conditioner

1 Answer

What are the annual checks and servicing that should be done can these be done at home by a handy man?


Are you refering to a split system/ furnace and Central Air? Start with the furnace filter at the indoor
unit. Most newer furnaces do not have an oil plug for
the blower motor but it does not hurt to check to see
if it has oil ports.

You can take a thermometer and take a temperature difference across the coil which should be between
14-20degrees.

At the outdoor unit you can check the condensor fan
motor to see if it has oil ports. After you have the top
of the fan off to the side, you can take a garden hose
and wash the condensor from the inside to the outside of the coil.

You can start the cooling and make sure that hot air
is discharging out of the top of the condensor. Check
to see if the insulated suction line is getting cool.

Jul 01, 2010 | Heating & Cooling

2 Answers

Carrier air conditioner isn't cooling the house. It is blowing air, but it doesn't seem to be cool air.


Check the outdoor unit to see if it is discharging hot air out of the top ofd the unit, check the insulated suction line to make sure it is cold or sweating. Try to listen to the outdoor fan and the compressor to make sure they are both operating

Jun 24, 2010 | Carrier 38CKC036 Air Conditioner

1 Answer

Ruud unit will not cool below 81


If the suction line is sweating and your air coming out of the registers is around 50deg. and you have condensate dripping from the indoor unit, then the unit is undersized.

If you dont feel any hot air coming out the top of the
outdoor unit,then either the compressor is not operating or you are low on refrigerant

Jun 16, 2010 | Ruud UBHC Air Conditioner

1 Answer

Home Air Condition cooling problem


Hello. If your outdoor coils are dirty it's a good chance the indoor coils are dirty also. Clean the indoor coils and flush out the condensate line.
I know it's tempting to feel the air and try to decide if the unit is working properly but, you need to use a thermometer and while the unit is running check the temperature at the return air vent and then check the temperature at the supply vent closest to the unit. Remember to let the thermometer set for about 5 minutes before reading.
You should be looking for about 15 degrees F cooling between the return and supply.
If your coils are clean make sure the outdoor fan is operating properly. The air coming out of the outdoor fan should feel warm, almost hot. If not you may need to check your pressures. Good luck and let me know what you find.

Feb 03, 2009 | Ruud Central System Air Conditioner

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