Question about Frigidaire FAC126P1 wall/window Air Conditioner

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Compressor unit on my frigidaire will not shut off after temp reached or system turned off

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It would appear that you have a fused contactor. If you dont feel comfortable replacing this check on one of the experts on this site. or if you feel ok replacing it remove the case off the old unit. Make sure it is unplugged first. There are two leads coming from the compessor follow these to the block they are connected to this is the contactor you will need to respond with the voltage and amperage rating off of this to size your new one just take the screws loose from both sides of each wire keep track of where they connect to then put the wires in the new contactor the exact opposite of what you rmoved them. Reinstall the cover and you should be good to go

Posted on Jun 12, 2008

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I have a Dometic a/c with a digital thermostat. When I have it on cool the compressor will cut off when the proper temp is reached but the fan continues to run and won't shut down unless I turn off.


It could be could be several things depending on what type of AC it is. is it a window unit, or a split system. Could be a bad thermostat or thermostat wire or bad board or a safety or wired wong.

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What causes compressor to work fine then shut down and not come back on for an extended amount of time?


Sometimes these AC's need to be removed and given a damm good cleaning with a spray hose, and any filters replaced. Clean the internal fan(s).
This can sometimes fix overharting of the compressor or misleading air temp sensing..

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"I have a White Rodgers 1F78-151 thermostat and for some reason the system keeps shutting off every few minutes and never reaches my desired temperature i constantly have to set it to off than back to


Is this a gas fired furnace? If so it may be going off because one of the safeties is tripped. There is a high temp safety that will shut the unit down when this temp is reached. The usual cause is low airflow. Check your filters, if these are OK you may have a blocked coil which should be professionally cleaned.

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1 Answer

About once a week the compressor get hot and shuts off. I have to leave hom for 12 hours then turn unit on and it cools for another week and shuts off again?


If compressor starts, check the running current of the compressor. If amperage is too high together with the discharge pressure, try cleaning the condenser fins and then after cleaning test the amperage and pressure again. If the pressure is still above the normal operating of 300psi, release some freon. If the discharge is too low below 200psi and running ampere of compressor is below the rated ampere of the unit add some freon from the suction line until it reaches 60-65psi. If still suspicious with the unit, try removing all freon charge and evacuate the system to 30 in. Hg to remove any moisture from the system and hold the vacuum for 30 minutes. If no increase in system pressure, recharge and check pressures and amperage.

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We have a MXZ-3A30NA that does not seem to be cooling down the house. Indoor temps are reading 75 to 78 degrees and the units are set at 65. We have gone through the book and have followed the check list...


Hi!!

Check the following:

Make sure the filter and the evaporator coil are clean. Also check condenser coil in the outside unit is clean.

When unit is turned on there should be (on the led display, inside unit) one green light on for the blower and another one for the compressor, both lights should be ON untill the unit reaches the preset temp. If the light for the compressor (usually the light on the right side) does not stay ON, check the outside unit.

On the outside unit, check that when turned on, both the fan and the compressor kick in and stay running. If the fan motor stops, the compressor overheats and the thermal proteccion shuts it down to prevent damage. Also, if the R22 gas is low, the low pressure switch prevents the compressor from running.

Good Luck!!





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1 Answer

Unit does not cool. Original unit was replaced because of defective compressor. Replacement unit worked in store but now does not cool and alternates blowing cool and warm air.


Is this a window unit? Sounds like the compressor may be cutting on and off. That would cause the alternating air temp you are feeling. Make sure the condenser fan is running. If it isn't running head pressure will build up on the compressor until it shuts down. Then the pressure will equalize and the compressor will kick on again. Also check your filters and the condenser coil to make sure it is clean. Let me know what you find.

Jul 08, 2010 | Frigidaire Air Conditioners

1 Answer

Possible Contactor Issue


Sounds like a bad fan switch in your unit. That unit has a fan board in it that is time delay on and off. Turn the fan to the on position and let it run all the time. If it keeps temp and does not shut off it is the fan realy board. The board also controls the compressor. Check that first and then the tsat. Russ

Jul 24, 2009 | Carrier 38CKC042 Air Conditioner

1 Answer

When unit starts the condensor fan only comes, not compressor


You need a new fan motor and the correct capacitors for your sydtem I think they are 35 or 45 5 cap. Try a hard start kit on compressor. Are you sure you have the cap wired correctly?Russ

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1 Answer

Air conditioner compressor keeps shutting down


This is due to thermal overload,Which can be caused by low oil in the compressor,the fan has stopped running on the unit outside,Dirty coils,or just a worn out compressor.Although this is thermal overload,It has nothing to do with outside temperature,But rather the internal temperature of the compressor itself.

May 19, 2009 | LG Air Conditioners

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