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substitute the ECM with a known good unit
indications are that there is a component in the ECM that is overheating and failing but when allowed to cool down again operates until it again over heats
Do you hear a click sound as the compressor shuts down? If so that is the clixon (heat sensitive circuit breaker) that is opening and shutting down the compressor when it overheats. You have not had the AC filled with refrigerant so overfilling the unit cannot be an issue.
And if it is not overfilled overheating is caused by excessive current going into the motor which could indicate a problem with the motor windings..
OR, If the thermostat is faulty it could be prematurely shutting down the compressor. If you jump (bypass) the therm and unit does not shut off then you have found the culprit.
My central AC unit decided to stop on the hottest day of the year. It would start and run normally for a few minutes and then the blower would shut off. After checking the breakers, thermostat and overflow shut off (did not have one) I saw something about a blower motor capacitor. This was easy to get to and replace and my last hope before waiting for someone to come fix it. The capacitor cost $4.04 with tax and had my AC working again. Needless to say I was beyond happy. I hope this can help others with a similar problem.
Had a similar issue with my dewalt 4200 pw. Unit starting shutting off after spraying for about 5 min. Then difficult to restart, but would start again eventually only to shut down a few min later. Had new engine oil, new pump oil, good gas. I changed the spark plug and unit runs great again!
More likely the out door fan motor has bad bearings and that would cause the out door unit to run for 15 to 20 min but it could be low on freon
when the out door unit runs after 3 to 5 min the larger of the two copper lines going into the unit should be ice cold
If the thermostat you just installed has a time delay that will keep the indoor blower motor running for up to 5 min after the unit shuts off
well when u have outages the voltage drops obviously, the one that suffers are the capacitors the capacitor for the compressor might need to change, change it with the same capacity as the old one example if labels say 55 microfarady ( mf ) ( 55 mf ) get one of the same I am not saying it is a 55 mf capacitor vary depending on motor and brand. So check the label
Air conditioners need a few mins to stabilize (the fluid in the lines) after they are shut off in the middle of operation. The comperssor will normally time out for several mins after it shuts off (or you shut it ofF) preventing it from coming back on within that time. So if you turn it off, and then right back on, you can expect warm air for several mins untill it times out.
Sadly, light duty machines as yours do overheat and shut off. Shredders are rated for run time. An example: 4 min run time with 60 min off to cool down. I could not find your machine's rating. However, given the 10 page volume I would guess the rating close to the 4 min on. High volume shredders are rated as continuous run. They should never over heat.
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