Question about Heating & Cooling
Since the AC has been stocked for a long time, you may want to open it up and inspect the inside. Most likely it is caused by dirt or debris stuck on the evaporator coils. A pressure wash with water would be good. If the cleaning does not work, you may check out the thermostat if it is working.
Posted on Jul 30, 2009
When u say the AC is running you mean just the fan I assume? in that case the problem may be the compressor module is low on charge or the compressor is defectivce or the compressor isn't getting any power, move the temperature control switch around and see it it starts the contacts may be dirty, if that doesn't get it then the system should be next checked for a defective thermostat, if the unit is really old you may not be able to get parts, to test the thermostatic control just use an ohm meter and see if the resistance changes as you adjust the switch,
Posted on Jul 29, 2009
Quite often when A/C units get little use for long periods they fail to work when being turned on the following season, In other instances gas may be lost through a leak. To check the compressor is working let the unit run for several minutes and turn to heat phase, or off. The unit should make a chunk and hiss sound. If this sound is absent then the compressor has failed and will need replacement. Low gas can also cause this sound to be absent or weak in response to the changing of the mode switch.
These types of problems are difficult to diagnose remotely and can only be correctly determined by a qualified A/C engineer.
I can recommend a Kludge test or fix you can at least try, start the unit up with the cover open. there should be a black pot unit on view this is the base of the compressor. take a rubber hammer and strike this pot fairly hard. What this does is releases a stuck valve ( if that is the problem) The gas fluid often becomes thicker with age and causes the valve to remain shut, the strike will hopefully release it and allow flow and thus cooling.to occur.
If this works i advise to leave it to run for an hour or so and whenever you enter the end of the season make sure to at least turn it on occasionally to keep the fluid from settling and becomming thick and the valve sticking again.
If all else fails call in the technician who can fully check and service the unit for you. There is nothing like regular maintenance and its as simple as running the unit for a few minutes at least twice a month
Posted on Jul 29, 2009
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Posted on Jan 02, 2017
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