Having problems with your Air Conditioners ?
Compressor keeps humming in off position.
No, the contactor is a power passing(@contacts) and a power consuming devise at th coil. you can simulate the coil bing energized by pressing in contacts.
Repair Help & Product Troubleshooting for Air Conditioners
You need a second opinion or clarification ? ask it in the comment box OR you can Ask Your Own Question
Tips for a great answer:
- Please provide as much detail as possible as this will allow our members to better understand and respond to your Comment
- If you need clarification, ask it in the comment box
- It's 100% free, no registration required
Suggested Questions/Answers :
It is recommended you read all this kind of situations
Compressor keeps humming in off position.
No, the contactor is a power passing(@contacts) and a power consuming devise at th coil. you can simulate the coil bing energized by pressing in contacts. ... GE Zoneline AZ55H07D Air Conditioner
Compressor keep running in off position
You could have a relay or contactor inside the unit welded closed, therefore compressor will keep operating when unit is off. replace compressor contactor. ... GE Zoneline AZ55H07D Air Conditioner
I have a Duo Therm unit on the roof of our 1995 Nomad camper trailer. I think the contactors are stuck closed..here is why. When the AC unit satifies the thermistat, the fan turn off, but the compressor (Humming sound)keeps running...until I hit the AC 15 amp breaker. Even if I put the thermistat up passed the current temp, the compressor still keeps running. Where are the contactores / relays? Shal I take the cover off, and start looking around? I would expect a low voltage relay for the thermi
You can get a manual for this in the library section of the Hi-Lo Trailer Forum. I know this isn't a Hi-Lo but the AC unit is the same. www.HiLoTrailerForum.com ... Air Conditioners
When I turn the a/c on, the compressor runs for about a minute then shuts off "but while the compressor is running, it sounds sluggish". When I have the thermostat in the off position, the compressor has a "hum" to it.
Turn power off of unit it prob has a bad run capicitor on the compressor look for swelling or oil around the silver capacitor ... Air Conditioners
Dometic unit cools great but compressor does not cut off when desired temperature is reached. The thermostat is on wall. The fan will cutoff at proper temperature but the compressor keeps humming and therefore builds up ice without fan running. What would the problem be?
Hi, as you know the thermostat controls the unit. Here's what you need to do first. Go to your thermostat on the wall, pull off the cover. You are looking for the main control wires that come in from the back to connect to the screw terminals. Don't ... Dometic Rooftop RV Air Conditioner
I have an Intertherm S3BA-048KA Split AC system which has stopped blowing cold air. Indoor blower is working fine. Outdoor fan is not working. I have reset breakers (indoor/outdoor) without success. I can hear a hum coming from outdoor compressor even when outdoor breaker is in off position. I had a problem with a System Breaker last year at the blower due to condensation leading to internal corrosion of the breaker. I replaced with a "suitable substitute" (same rating), not OEM. Request
First thing I would look at is to make sure you have power at the disconnect 110 coming in on each leg to unit. Second, I would look at the capacitor for obvious bulging or leaking Third I would check to see if the contactor has burnt poi ... Air Conditioners
The blower on my Dometic Rooftop AC shuts off then the RV reaches the set tempature but the compressor keeps running. It even runs when the therostat is in the off position. It will only shut off when the breaker is turned off. Can you help? If so, can the problem be fixed by myself?
There is a wire that is wired to the wrong unit,the thermostat wire needs to go to the compressor,so it will cycle,and the wire that is going to the compressor needs to go to the blower. ... Dometic Rooftop RV Air Conditioner
Compressor keeps humming even with thermostat on 90. Before this the ac kept freezing up and ice would fall from ac into cabin.
Check freon level and put on a hard start relay kit ... Dometic Rooftop RV Air Conditioner
Duo-Therm Compressors will not shut down. In "off" or "furnace" the compressor keeps running. Either compressor will shut down when the 12vdc fuse is pulled. Fans on both work ok in both speeds. I
What about one for cool only, and one for heat/cool ? ... Dometic Air Conditioners
AC compressor hums for a few secs then cycles off for few secs
Inspect all electrical wires and connections and correct any areas that appear damaged or overheated or loose (connections). There is a capacitor which is a round or oval component in series with the contactor and the compressor. Thoroughly mark all ... Dometic Rooftop RV Air Conditioner
When the AC fan shuts off, the compressor appears to be stuck. It continues to make a humming sound as though it is running. If I remove power and return power it hums momentarily and then shuts off. Is it OK to allow it to "hum"? I constantly kill the power when the fan shuts off in fear of harming the motor or compressor.
Yes, not good for compressor to stay on after being shut off, and hitting the breaker to stop it is a good idea. Sounds like you have a faulty/sticky relay. Not an expensive part, and shouldn't take any longer than 1/2 hr to change. Have a technician ... Dometic Rooftop RV Air Conditioner
I have a delonghi pinguino classic pac 25 i have to keep reseting red button on rear after aprox 2-5 mins as compressor cuts out &does not seem to restart but fan keeps going & red light with ! this comes on do you now the problem.when compressor is going it is cold .thanks greg
Yes, bought one today, everything was fine until I put water in the tank, then it stopped after about 3 min. I think you will find that the previous owners (assuming 2nd hand) haven't de-scaled it. Take the rear cover off 5 self tap screws & you ... DeLonghi Pinguino PAC-77E Air Conditioner
9/13/10- Our air conditioner makes a loud noise every time it goes on-enough to keep us awake at night. We have had your representatives in to look at it as well as the people who installed the system in 2006. There seems to be a conflict of opinions. One says I need a compressor, the other says I don't. They also suggested that I wait until the compressor dies to do something. In the meantime, no one has done anything or offered a solution for months now. If they keep me waiting long enough,
Hello They sell a compressor blanket/jacket that will insluate/dampen compressor noise.It might help. ... Air Conditioners
My portable LG (model LP0910WNR) AC keeps shutting off the a/c but keeps the fan on. when i turn on like normal and select cold (meaning a/c on) i hear it kick the compressor on and cold air is flowing then approx, 3 minutes later ill check on it and it blowing ambient (room temp) air only. and the a/c compressor isnt on just the fan. only 6 months old
... Air Conditioners
On a brand new KUHL sl-36 n-30-a which replaced an older sl36 the unit has to be set at 60 degrees to barely keep room at 80, it runs compressor for two minutes then hourglass alert comes on and turns compressor off for three minutes, and keeps going this way, what is wrong?
... Friedrich Air Conditioners
48xp my carrier 48xp-060090311, has a slow down mode with blower to keep blowing after compressor shuts off. It suppose to slows down and keep blowing at a slower speed so as to save money by having air blow across coils. It does not slow down now and compressor stays on for long time. Some times it gets warm other times I have to raise temp. to get unit to shut as it gets too cold.
... Air Conditioners
Dometic roof top AC unit compressor turns on even if T-stat is off. Only way to get the compressor from turning on is to turn the breaker off. Unhooked T-stat wires to see if issue was there but the compressor still kicks on when I turn the breaker back on. If I leave the auto t-stat on, the compressor will turn on for a bit with a loud hum until after a couple minutes or more it shuts off with a loud thud that will shake the RV. Then after a while it will do it again. Only let it happen twice
Sounds like you may have a couple of problems there. First, have you checked incoming voltage to make sure you are getting 100-120 VAC at the AC control board in ceiling? If that's ok, try removing/disconnecting Ac compressor wire at ceiling control ... Dometic Rooftop RV Air Conditioner
AC Compressor I am trying to determine where the compressor contactor is in the Coleman roof ac in my fifth wheel. The unit blows cold air but will not shut off. Regardless of settings on the thermostat the compressor keeps running. The only way to shut it off it to use the breaker.
You can find the contactor in the access/service panel area. ... Air Conditioners
I have a Dometic rv air conditioner model 620426.331 and it will not start. Fan runs and i heard a loud humming noise, I assume the compressor is trying to start then the humming goes away. If I leave the swich on the humming returns every 30 seconds or so
Sounds like start capacitor for compressor may be faulty. Don't try it yourself if not experienced, they can store 340v- 400v . Only about a $20 part. ... Dometic Rooftop RV Air Conditioner
My AC My Compressor keeps kicking off. I turn the unit on, the fan works. The Heat works but the compressor turns in about 60 sec. If I unplug the unit and turn it back on, it comes on but the compressor shuts off again after 60 sec. Can this be from dirt in the coils? They have some build up. Any other causes?
One might think so, YES the compressor is running till it gets hot and tripps on hi-temperature, and after it cools down awhile, the switch willcautomatically reset itself and back- & forth......Thank-you-very much! ... GE Zoneline AZ38H12DAD Split System Air Conditioner
I replaced a compressor today filled everything properly.also replaced the capacitor and the contactor. the compressor is getting really hot and it keeps tripping the breaker. do you think its a bad compressor or should i wait for it to cool off.
I have some question:1. Is the location of your outdoor unit have no any obstruction? Means that air out of the outdoor is not short cycling into the air in.2. Did you check the current reading during start up of the unit? Is it li ... Air Conditioners
My unit's compressor will intermittantly stop working. The thermostat seems to keep the intake unit working but since it can't get the temperature down it never shuts off. We have been removing the batteries and letting the thermostat reset for 20 minutes. (thermostat Honeywell RTH23110B). After the reset the compressor will work again but will fault within a day. I am pretty sure that the compressor and fan are functional as if I press the contactor down it begans functioning. I also, to he
If the air handler coil is clogh , the air won't go through and the compresor will shut off on overload because of high head pressure, also this will happend if the condenser coil (outside) is blocked or if the fan dosn't work .Also if the outdoor un ... Air Conditioners
Thermostat ? no matter what temperature is selected, the compressor keeps running and doesn't cycle off. compressor shuts off when just fan is selected, but cool mode just keeps chilling. unit is six months old. energy saver does not work. unit just keeps running.
I'm thinking the bi-metal is working, that's why you can hear a click, but the contacts are welded together. The bi-metal doesn't have enough strength to break the weld. Time for a new thermostat. ... Air Conditioners
Cooling well it starts just fine cools for about two minutes then the compressor shuts off unexpectedly? i thought it might be the thermostat? i bypassed the thermostat completely but no luck? i can here the compressor come on when the unit is switched on and it does appear to cool down before the compressor shuts off and the fan keeps running.
Check if the condensar ( outside fan unit) is getting enough free ventilation. IF there is no free air flow you will mostlikely be triping the unit due to short cycling. Ie the unit is pulling its own discherge air causing the compressor to trip due ... Haier HPAC9M Air Conditioner
Hello,im charles we have a jbs unit ducted unit the indoor turns on but the outdoor does not. i have put new capacitors and by pass the contactor, but i get a humming noise out of the compressor and the fan does not turn. I think it the compressor but dont want to change it if i can make it work. what else can i do? its a sanyo 10kw compressor .
You can try a hard start kit that can be purchased from an a/c supply store. This hard start kit adds a little extra boost of power to the compressor that in the event the com,pressor is wanting to be a bit stubborn when turning on this kit will ass ... Air Conditioners