I had that "liquid slugging" problem going on about two months ago, when the sequencer did not turn the fan on, but the compressor was running anyway. It ran afor a few days like this before I discovered it.
Now I have the opposite problem- the fan works but the compressor tries t start... i guess it's every 60 seconds or so, but regardless, the compressor unit outside buzzes like it is trying to start, then nothing.
Is the whole comressor unit shot?
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Normally if it does not sound right, it is not right. By your discription it sounds like your compressor is having a problem with flood back caused by a txv not metering properly, or an overcharged system. You will need a tech who can determine superheat and subcool for your refrigerant system. Find a tech who can determine these values. Superheat and subcool is normally around 8 -12 degrees. Superheat is the amount of additional heat the refrigerant picks up in the evaporator once it is turned to gas and is needed to keep liquid refrigerant from flooding back to the compressor. Compressor are designed to compress gas not liquid. Subcool is the additional cooling refrigerant undergoes once the refrigerant turns back into into liquid in the conderser. Subcool ensures the refrigerant remains in liquid form until it reaches the metering device. Only liquid suppied metering devices will pass the required amount of refrigerant to achieve the rated cooing or heating rates. If it is liquid flood back, your compressor will be damaged and will need to be replaced. Hope this helps
Hi, If the fan is running and the compressor is not running then you should be getting power to the compressor... Often the dual capacitor will go bad and then the compressor will not start. I usually change the cap to make sure that is not the problem. If the compressor still does not start then check the start amps and you will find that you are probably getting locked rotor amps. or no amps... (open windings) Either way you will have to replace the compressor...
This is a reach here---it sounds like it could be low on refrigerant---but hold it---have you moved this unit from one spot to another--if so it needs set for 24hr before energizing it--also has mice made a nest in the compressor-condenser area---they may chewed on some wires--on some unit there a heater on bottom of compressor to keep the refer in gas so not to slug the compressor with refer liquid since liquid does not compress maybe locking up compressor. GL
When 13+ SEER condensers are replaced without installing a inside coil with an expansion valve the compressor in the new unit will slug and go bad. Slug means that liquid refrigerant returns to the compressor. Liquid can not be compressed so it causes the compressor to fail.
When a compressor is has to start. 1. HAs it been off longer than five minutes. As a service tech when I run on to this problem I install a hard start kit and a time delay. The start kit helps the compressor to start under heavy load condtions. The timer helps the compressor to balance out before tryng to start. Have tech set at 5 minutes. I install hard start kits and time delays on all my change outs. Replace problem will go away. Thanks Rus
to see if the compressor is running feel your line set the liquid line (small line) should feel like there is fluid flowing though it, you can also disconnect the o/d fan briefly if you want to be certain the compressor is running, it best however to get a meter and amp clap to do a proper diagnosis, you are limited to your tools as well as your knowledge, call an NATE certified professional.
That's a weird problem. I wonder if the outside compressor is drawing down the voltage in the breaker box enuff to keep the blower from starting up. If you're set to cool but the thermostat is NOT calling for the AC, can you manually turn the blower on fathfully? If so, I would check all wiring connections in the breaker box to make sure they are tight and free from tarnish or corrosion. You may even need to contact your power company and have a higher amperage line installed outside. Do your house lights blink noticably when the compressor kicks on?
While you're resolving this, you could start the blower manually and just leave it on. The compressor cycling on/off shouldn't stop the blower once it's running and it won't draw much current... couple bucks a month maybe.