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Air handler shuts down and compressor keeps running and is freezing up

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Fan failure could be electric relay contacts, run capacitor,or the motor itself. Call in a professsional.

Posted on Jun 24, 2009

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Can not blowing as hard as it should. Compressor kicking on but freezing up easily. Any ideas?


Check your filters and make sure that there is adequate airflow, also make sure that any drain tubes are not plugged.

Jul 03, 2015 | Heating & Cooling

1 Answer

Heat pump problems


Some heat pumps have high and low pressure swiches installed to keep compressor from running when unsafe conditions occur that can damage the compressor. If the outside fan is not turing on, the unit is cycling on high pressure, if you see ice forming on the big refrigerant line coming from the air handler, then the compressor is shutting down on low pressure. Low pressure can be cause by lack of air flow through air handler or from a low refrigerant charge.

Feb 13, 2014 | Intertherm Heating & Cooling

1 Answer

Model Number: UACC-036JAS The unit works fine. The problem is it doesn't shut down after the specified temperature has been reached. The furnace blower shuts down, but the ac unit keeps on running....


Hello, usually a stuck contactor coil will cause this on the outside unit. When the outdoor unit runs continously and the indoor blower does not run no heat is being absoebed by the evaporator coil and thus the line freezes. Replaceing the contactor will fix the problem.

Aug 30, 2011 | Ruud Heating & Cooling

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Were is the reset button on the unit?


Hi, here is the theory on the reset button on Air Conditioners. They reset via the breaker panel box in your house. Check that first before anything else. However if your unit is popping breakers, it is because the rating for the breaker is incorrect, or there is something that needs servicing usually in the outside unit called the condenser. That piece contains the compressor. A faulty compressor and pop the breaker. Or If the condenser fan that blows over the coils of the outside unit stops (common failure) The compressor will overheat and shut down. That may not trip the breaker but the house will get hot anyway. Usual action for this is to replace the condenser fan motor and starting capacitor. Make sure the speed rating and directional rotation for the replacement motor is the same as the motor removed.
There are other reasons why the system won't come one fully. If the wall thermostat is digital and does nothing. including turning on the fan. There will be a small fuse located on the circuit board of the air handler (part of Air Conditioner mounted inside the house. It houses the circulation fan). That fuse could be blown. That one shuts down just about everything.
On air handlers mounted up into the attic crawl space there is an overflow pan. This pan is mounted directly below the air handler. This pan can fill with water when the drain pain contained inside the air handler starts to overflow because the drain system to that is clogged.
There is a "float switch" mounted in the overflow pan wired to the system in such as way as to shut down the entire AC system if that pan fills.
The handling is to clear the obstruction in the Drip Pan inside the air handler. Then remove enough water from the overflow pan and the AC will run as though nothing has happened.
If you have more questions, write to me on this site.
One thing more. The capacitor alone in the Outside condenser unit can fail and that will stop the condenser completely if it is of a "split" design and used for both the compressor and fan. When replacing this unit alone, ALWAYS find the same specification part.
I hope this helps,
Have a Happy New Year,
Mark

Jan 02, 2011 | Goodman CLJ30AR32 Air Conditioner

1 Answer

Hi, After finding out that Freon is low by seeing snow/icy surface on outside compressor, I went up in the attic to find snowy/Icy surface all over the coil inside the air handler. I wahsed it and made...


Hello
Your still froze up.There is a freeze cutoff device in the air handler upstairs.
Look for a thin silver color tube near the coil and follow it to the control box,there may be a reset button.If not, try using a hair dryer to warm up the coil and it should reset itsself.
These freeze devices can take an hour to reset on there own sometimes,do not run the compressor while doing this.

Aug 30, 2010 | Ruud Heating & Cooling

1 Answer

Things in freezer melt and re-freeze


Your condenser fan motor at the compressor is either filthy or needing to be replaced. Air flow is pulled over compressor to keep it at a good operating temp. If the fan cannot pull air across compressor it will over heat and shut down on overload. Imagine working in yard on hot summer day and wearing a dust mask over your mouth and nose. Your body shuts down more needing more rest. Same thing with refrigerators, they have to be able to breathe properly also.

Jan 27, 2010 | GE Freezers

1 Answer

My goodman air handle is run on e-heat only and will not turn off ,also the outside unit will not turn on , I put a new themostat this didn't help I have a goodman heatpump


Heat-Pumps can be temper mental. Sounds to me like your air handler is running on emergency heat, due to a problem with the condensing unit.You have heat strips in the air handler in case the outdoor temp. gets to cold and the heat pump cant keep you're home warm.Also, if you loose a compressor, it will go into emergency heat. If you have lost the compressor for one reason or another, lets say a locked rotor, the compressor would draw L.R.A. (Locked rotor amps) and cause the circuit breaker to trip. Check this.As for the air handler running all the time, you said you replaced the stat? When you removed the control wiring from the stat, did the fan shut off? I wish I were on site to help you, but all I can do is offer you some advice. With the power off to the air handler, go to the stat and remove the red and green wires. Turn power back on and see if it stops running. If it stops, then it sounds like the new stat is also faulty? If it continues to run, check the wiring in the air handler to make sure the red and green are not touching somewhere, and also check the control wiring on the outdoor unit for the same problem. Do you have any dogs that may have chewed into wiring? If so, check all outdoor t-stat wiring. There are so many things it could be and I hope very much I have helped you with solving this online, which can be difficult. You may also have a faulty defrost board. Try to do what I have asked of you.
Good Luck, Sincerely, shastalaker7

Oct 16, 2009 | Goodman GMS90703BXA Heater

2 Answers

Fan quits and the compressor still runs


is this a split residential system. it sounds like you are talking about the condenser fan either way it seems like the fan is overamping and tripping on thermal overload which is a device in the motor that protects itself. when you shut it off for a while and turn it back on does the fan work. if you turn it off then turn it right back on does the fan work. when it shuts off is the motor really hot. if possible, and you know how, check amp draw. typically you can find the rated amp draw on the motor nameplate.

May 27, 2009 | Carrier 52CQ315 Air Conditioner

5 Answers

40 hp ingersoll rand rotary screw air compressor keep shutting


I have a ingersoll compreesor that keeps shuting down on high discharg air temp

Nov 12, 2008 | Ingersoll Rand Stationary Air Cooled...

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