Question about Air Conditioners
SOURCE: Compressor will not start.
If the unit is low on freon it will short cycle but a compressor internal overload will cause it to. Lets hope its the freon. Has it been frezzing up lately. Low freon is the cause most of the time. Make sure your filters are clean and both fans are running. Hi head can cause this to. (fans not running) How old is this unit. Maybe the coils need to be cleaned. Sound like this unit may need a check up and a good cleaning.
Posted on Nov 02, 2008
You may have cottonwood on your compressor. Before you spend any money, do two things. Rinse off your compressor to clear any cottonwood, and check your filters, they may need to be replaced. Hope that helps!
Posted on Jun 24, 2009
SOURCE: A Trane 20 Ton roof
Before ordering an expensive air conditioner service call to restore lost cooling capacity, here are a few simple steps to perform.
Check the Room Thermostat Temperature Setting: Set the thermostat to at least 5 degrees below room temperature. Our elderly mom has no patience with switches and controls. She regularly calls her air conditioning service company with a service request, sometimes late at night, because she has simply failed to set the temperature on the thermostat lower than the room temperature. Don't drive your A/C like our mother.
Check that the Room Thermostat is set to "Cool" not "Off" or "Heat". If the thermostat is not set to "cool" it is simply turning off your A/C.
Check that electricity is on for the equipment. Check any service switches, including outside by the compressor, inside at the air handler, and fuses or circuit breakers in the electrical panel.
Check the Outside Air Conditioning Compressor: is the outdoor compressor-fan unit (the condenser unit) running? If not, be sure that the outdoor service switch and the indoor power switch, fuse, or circuit breaker are all in the "on" position.
Check the Indoor Air Handler: is the indoor blower unit running? If not be sure that the electrical power switch at your furnace or air conditioner air-handler is in the "on" position. Sometimes there is more than one switch, such as one right at the unit and another at the entry to the room where the equipment is located, or even upstairs on a higher floor if your air handler is in a basement or crawl space.
After doing all you should be able to fix the problem without calling a technician.
Thanks for contacting Fixya.
Posted on Jul 24, 2010
Sounds like an open in the stator coil itself if power is at it's source. Common in auto application as well where there is no magnetic field to draw in compressor drrrive plate/clutch. Ohm out stator for an open, Otherwise, physical debre/rust seizure can prohibit operation.
Posted on Aug 12, 2010
One of the safety switches in the control circuit for the secind stage are bad... the contacts are pitted or corroded and are not passing the full voltage through...it will be hard to find the bad one because it will only do it under load...I would start jumping out safety switches for a short time and checking voltage to the coil til you find the culprit...
Posted on Aug 21, 2010
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