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Compresser will not quit running - Heating & Cooling

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Turn your thermostat off, if still running ,then the contactor is stuck in close or run position, the thermostat controls the open & close of the contactor coil.. Replace the 24volt contactor on the outside unit and your problem is solved!

Posted on Sep 04, 2008

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Coleman Rooftop AC fan stops after 7 or 8 minutes of running. Will turn on again after about 10 minutes on its own.


Remove green (fan run) wire from thermostat, and connect to red wire (power) and see if fan runs, and if it will stay running. That will by-pass thermostat to see if it is problem. If it continues to run, thermostat is problem. If that doesn't cure it, I'd remove cover up top and with power off at circuit breaker, blow compressed air in to motor air holes to make sure it's getting proper air for cooling, as well look for small plastic plug on housing where oil can be added ( few drops) to lubricate motor. Leave cover off and try fan to see if that may help. If at all possible, a clamp on amp meter will confirm if motor or relay is at fault if none of these suggestions help. If amp draw at motor too much, motor may be seizing when warmed up from running. test draw when first started and after running for amount of time that it usually quits, and if noticeable difference, motor is seizing and needs replace. You can also test amp draw at main 120v feed wiring with unit just in fan mode.

Sep 13, 2012 | Coleman Heating & Cooling

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Quit running just a hum - there is power to it. What should we do to check out problem please?


Since you didn't specify which motor I will guess you are talking about the fan motor on the condensor. What I would do is to shut the power off for 30 mins. then turn it back on. If fan tries to start you might see if you can help it by using a pencil to start rotation.If it goes ahead and runs then I would let it cycle and see if it will restart by itself.
If you can get it running then I would remove motor and clean it thouroughly. Use compressed air to blow out thru cooling ports in motor case, if there are any oil ports then add 3-4 drops of machine oil.You can also put a few drops around shaft where it enters motor.Hopefully this will help but if not then you may have to replace motor. Also if motor tries to start but can't then replace stat capacitor if it has a seperate one.Good luck and thak you.

Apr 15, 2011 | Heating & Cooling

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How the air conditioners give us cool air and how it works?


I am not sure what you are asking, but AC works via physics. There is a refrigerant, that is pumped under pressure until it becomes a liquid, and during that step it gets quite hot. Like when you use a bicycle pump, the bottom of the pump gets hot where the air compressed.
So, this liquid is run through a condenser, and is much hotter than ambient air, so it gives off heat. On a car, on front of the radiator, on a window unit, outside.

Then this refrigerant is routed through an expansion valve or orifice. This reduces the pressure and the liquid changes into a vapor and is MUCH cooler. Similar to discharging an aerosol can, it becomes cold. So then the refrigerant is routed through an evaporator, similar to a heater core in a car (location wise). Then air is blown through this evaporator and temperature is transferred to the refrigerant.
Then it gets compressed and the cycle continues.

Dec 07, 2010 | Whirlpool ACQ062XJ Air Conditioner

2 Answers

HI i think my split system compresser has locked up when the outdoor unit enguages it hums then the fan cuts in for 2 sec then it drops the curcit breaker i disconected the power wire to the compresser and...


Its quite possible it could be the start cap,(if the unit was running fine before) Your gonna want to check the connections to the cap first,(with the disconnect turned off first) If the connections are fine,you can install a booster capacitor To see if that won't kick it off.

Jan 25, 2010 | Heating & Cooling

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Ocasionally when the compresser shuts down the bloower keeps running and the compresser wil not start up untill we reset the thermostat


the blower fan will usually run for a short while on after the compressor kicks off on most systems. this is due to the colloection of condensation in the evaporator coil. running the fan will evaporate the remaining water on the coil, therefore it will not flood the drain lines.

Oct 06, 2009 | Ruud Heating & Cooling

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Window a/c unit comes on but no air comes out.It sounds like the compresser is still running.I dont know if the fan quite or what.When you turn it on it sounds like it is really laboring but not much...


could have a fan capacitor going out or the fan motor is going out . Usually the capacitor is the culprit. Have a a/c tech look at it the capacitor is inexpensive however it is hard to replace if you haven't done one before. Good Luck

Dave

Jul 15, 2009 | Heating & Cooling

1 Answer

Outside a/c fan quits but compresser still runs


it sounds like the fan is over amping itself and shutting down on thermal overload check the amp draw during running time and compare it to the sticker on the outside panel it should be running .9 amps, and it will over heat if it runs around 1.2 amps or above

Jun 21, 2009 | Goodman CLQ36AR49 Air Conditioner

1 Answer

Compresser is not running


The condenser fan motor is most likely blown. A replacement fan motor and a run capacitor are most likely needed to get it back in working order.

Jun 01, 2009 | Bryant Heating & Cooling

1 Answer

Compresser Shuts Off


It may be overcharged now. Let some of it out until it stays running.
Why did you add freon? if it needed freon then you must also have a leak or a bad compressor
What was the issue with the a/c to lead you to putting in freon?

Dave E. (Illeagle)

Jun 14, 2008 | LG Heating & Cooling

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