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I have no air conditioning at all. The thermostat was stuck on "wait" to protect the compressor. Once wait was gone it tried to cool again and nothing. Light on furnace is flashing like a heat call and blower fan is running. Lack of communication or compressor is shot? 92% 75000 btu unit. 2 ton condensor outside any way to diagnose the problem?

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Remove cover on your stat using a small wire not touching the ends jump red-power to yellow compressor should start red to green fan should come on im assuming the installer used the most common wire configurations these test can also be peformed at the inside the furnace remember 24volts is present sounds like your thermostat is bad easy to determine using the test i mentioned good luck

Posted on Aug 21, 2010

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When turning on, unit cools normally. After compressor cycles off, it doesn't come on again. I have just cleaned the thermostat/sensor thinking this may help, am waiting to see. Thank you..


Compressor may not be turning off due to satisfied temperature, it may be turning off on safety trip such as high/low pressure, current overload. When the thermostat is set to a certain temperature, the compressor cuts off once the temperature has been reached or satisfied, try a lower setting to see if the compressor satisfies the setting demand.
Some thermostats may be programmed by the installer to perform only a given number of cycles per hour, if your thermostat has this feature, eliminate the setting.

Apr 25, 2015 | Frigidaire Heating & Cooling

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How to fix problem of Air conditioner doesn't cool


How to troubleshoot and repair the most common problems with your central air conditioner Although some central air conditioner repairs must be handled by a qualified air-conditioning repairperson, you can handle simple repairs and maintenance yourself. Following, you'll find guidance based on the symptoms.

Air conditioner doesn't cool A central air conditioner that runs but doesn't cool may just need to be cleaned. Plan to do this on a relatively warm day. The following are basic guidelines, but always refer to your owner's manual.
1) Before you begin, turn off the power to the unit. There is normally a shut-off or disconnect panel on the house wall next to the outdoor compressor. Also shut off the air conditioner's 240-volt circuit at the main electrical panel.
2) Rake leaves and debris away from the outdoor condenser. Trim any bushes that might block airflow.
3) Unscrew and remove protective grilles and the top cover or grille from the compressor. If the fan is attached to the grille, be careful not to pull any wires loose.
4) Use a soft brush to clean dirt and debris from the fins, and then vacuum the fins with a brush attachment (taking care not to damage the fins).
5) From inside the unit, use a hose and nozzle with a trigger-grip to spray debris from the fins (protect the wiring and motor with plastic sheeting or a large plastic garbage bag). If your owner's manual calls for lubricating the motor, do that now--but don't overlubricate.
6) Reassemble the unit.
7) To test it, turn the thermostat to "Off," reset the power at the disconnect by the compressor and the main panel, and then set the thermostat to turn the unit on. Important note: To avoid straining an air conditioner's compressor, wait at least five minutes between turning it off at the thermostat and turning it back on. Let it run for a few minutes, and then feel the two pipes that connect to the condenser unit on the air handler (slide any insulation back). One should feel warm, the other cool.

on Sep 02, 2010 | Heating & Cooling

2 Answers

AC is not cooling


Problem #1:Outdoor condensing fan motor has stopped running. This problem could be caused by a bad motor run capacitor. If your motor capacitor is not the problem, then more than likely you need a new motor. Is the fan blade tight, stiff or hard to turn? If the fan blade is hard to turn then you probably need a new motor. Problem #2: Air conditioner compressor will not start. When power is applied to the air conditioning outdoor unit the fan starts, but you hear a sound like the compressor is trying to start, "UGGG"..., for about 5 to 10 seconds and then all you hear is the outdoor condenser fan run. The compressor is locked and will not start. What is happening is the compressor is trying to start, but because the compressor motor is locked it tries to start for a few seconds and then because of the high amperage being drawn goes off on internal overload. The internal overload protects the compressor windings from overheating and burning up. I see this many times during the start of the air conditioning season. Some compressors just have a hard time starting after sitting all winter long. Some compressors are locked up so bad that I can not start them and must tell my customer that they need a new compressor . Many times I can get the compressor started again without having to buy a new compressor or new air conditioning system by using the device that is called, "Super-Boost." I keep two or three of these on the truck. They have saved many of my customers from having to buy new air conditioning systems.

Jun 11, 2011 | Carrier 38CKC036 Air Conditioner

2 Answers

RVP 8000 A/C just experienced slight power surge. Compressor on.


I'm leaning toward sticky relay as well, but if you want to confirm it's not thermostat, remove thermostat from wall, and temporarily disconnect the yellow wire from thermostat (compressor) when/if, it happens again. If compressor stays running, I'd say relay for sure.
Just for future reference , Gray wire from thermostat is low fan, green wire is high fan, yellow is compressor, blue is ground. ( For cooling side) The red is 12 v + to furnace and white is negative to furnace.(heat side)

Jun 10, 2010 | Coleman Mach 15 Air Conditioner

4 Answers

AC is just blowing air. The compressor doesn't kick on.


no freon.. pressure test w/ nitrogen. 8000 btus is now junk. Spend the money on new unit otherwise find the leak. It leaked out thats why the compressor will never go on. Once you add freon she'll turn on...same as car.

Dont buy that name brand again. best of luck to you

Aug 17, 2009 | LG Heat cool Window Air Conditioner

1 Answer

Air condition won't work?


You may have a bad leak in your system. Your unit may have a low-pressure switch that turns the compressor on and off due to low freon pressures.

Aug 12, 2009 | Heating & Cooling

2 Answers

Intertherm S3QA042K compressor won't restart


You probably need a hard-start kit. A hard-start kit connects to the run capacitor and provides a starting boost for your compressor. If you install a hard-start kit, monitor your a/c for a while because it is possible that the bearings in the compressor are going bad.

Jul 30, 2009 | Heating & Cooling

2 Answers

Air condition problem


What type of thermostat do you have? If the fan is not coming on and neither is the compressor, then is more than likely a problem with the thermostat of control units of the Air Conditioners. The fan will come whether the compressor does or not if the thermostat and control unit are working correctly. Check for twelve volt at the control unit of the air conditioner ceiling unit. (Red Wire, should be labeled)

Jun 30, 2009 | Dometic Rooftop RV Air Conditioner

1 Answer

Air conditioning on '97 Dodge Caravan 3.0L not working. No power to compressor.


Wait until you get it full, then see what it does.Could just be freon running through evaporator, and air. Once full & run a while, it may stop, if not, your AC will probably quit cooling again, then you'll know.

Jun 11, 2009 | 1997 Dodge Caravan

1 Answer

Air conditioner keeps tripping breaker replaced the termostat do you think the compressor is gone its only 6 years old.


Every air conditioner has a motor called a compressor. The compressor provides the cooling capacity for the air conditioner. If the compressor or its electrical controls are defective the compressor may try to start, fail, and create an electrical overload. If the unit does create an overload, every compressor circuit is also equipped with an overload safety switch. The safety switch is designed to protect the compressor from burning out. The safety switch will cut the power to the compressor for a certain length of time and then reset itself. When it resets it will allow the electricity to flow to the compressor once again. If the compressor then starts, the unit should function normally. If the compressor doesn't start when the overload resets, the overload will again cut the electricity to the compressor. This cycle will continue indefinitely. (Always allow three to five minutes before restarting the compressor.) If this situation is occurring, unplug the air conditioner and get help from a qualified repair technician. This problem is often fatal to the air conditioner because the cost of repair often exceeds the price of a new air conditioner.

if this helps please vote me a fix ya

Jul 18, 2008 | Heating & Cooling

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