Tool List- www.amazon.com/shop/acservicetech Support- www.patreon.com/acservicetech For those that are looking for the tools used in the videos: (Linked Below) Here is a link to the UEI DL389 Multimeter used in the videos- amzn.to/2av8s3q Here is the link to the Fieldpiece SDMN6 Dual Pressure Testing Manometer with Pump-amzn.to/2jyK5Ka Here is a link for the Supco Magnet Jumpers amzn.to/2gS4h6z Here is the link for the Irwin Wire Stripper/Cutter/Crimper amzn.to/2dGTj2V Other tool links can be found in the video description section. ACSERVICETECH is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com.
I put this video out there to give visual, temperature, and noise cues to point you speedily in the right direction during diagnosis. I hope you enjoyed the video!
One way to identify the location of your connection on your cap is the compressor connection will usually have 3 male spade connectors, the fan will have 2 and the common will have 4 .
Nice job ACSERVICETECH!!! I wanted to ask and get your thoughts since I am a new tech. I carry a lot of manuals with me and notes on different trouble shooting issues and operations etc. Does that make me a lesser technician because I have to look things up if I cant remember or just want to be sure? Just wanted to hear your thoughts, because I really think you are a great teacher. Thanks again.
I know other business owners that have to stop and look things up. You can't know everything about everything so it sounds to me that you are just being thorough. Sounds like something a wise person would do. Thanks!
Get a tablet dedicated just for service. Start saving .PDF manuals and cheat sheets. There are lots of apps for reference and diagnosis as well. If you move up to smart probes better to read them from a tablet which you can leave at the unit instead of using your phone.
Hey Vjn, This was just a video for beginners, in fact I don't think I was using a mutimeter with this one. Have you seen any of the troubleshooting videos such as liquid line restriction, low airflow, variable speed, psc and ecm- non variable blower troubleshooting? Thanks and I just did one on the potential relay, thanks
AC Service Tech LLC awesome! No I did not see those videos my good sir, however, I know you can agree on many things that weren't executed properly by AC Techs. I mean many times I hear mixed up information on basic manifold gage readings regarding temperature/pressure association. I can't recall the last time I saw an AC tech checking for refrigerant leaks before adding more to the system. I guess everyone's approach to this trade differ somewhat, even though the AC system works better with only the correct appraoch at all time worldwide.
Have you seen the videos I did with the ultrasonic leak detector. I love that tool! It has really been very helpful compared to heated diode and other methods, thanks
Great Question! After you shut the power off, you don't need to really spend much time shorting out a run capacitor in general because when the compressor shuts off, it uses the voltage from the cap that was stored. You need to short start caps without resistors because they are taken out of the circuit with voltage stored.Regardless just for the accuracy of the reading, if there were a very tiny amount of voltage left in the cap scraping it before testing will give you the best result. Yes you are right though! Thanks for the question!
Is that the voltage while it is running too? You could megger the motor. It sounds like the windings are breaking down. Make sure the capacitor is the exact correct size that the motor is calling for. Look on the side of the motor at the rating plate for the correct cap size, thanks
I saw something werd to day variefyed that there is a piston in the air handler and my wet bulb is 57 degrees and a dry bulb 75 degrees my target sh is 7 degrees but my problem was I had a 1 degree sh but I can't remove refrigerant to make the sh go up or the suck temp will be below freezing hight sh add low sh remove (right)
This is correct. What about the airflow on the evap coil? If there is more airflow then there would be more superheat. A problem could be restrictive filter duct, obstruction, blower motor tap speed, dirty coil or it is actually possible that the orifice size that the installer put in is for a unit that is larger in btu capacity.
Hey that's kool but capacitors go bad because of many reasons...1,low refrigerant in the system can cause stress on the capacitor due to overwork 2, the incorrect gage wire that support the capacitor from the contactor can result in damage also as a result of stress 3, the capacitor might be too small for the unit its feeding 4, the condenser might be clogged and therefore needs cleaning which burns more electricity in order to dump heat and thus put stress on its components...I can go on and on. I realize nowadays these type of AC Tech. Only focus on small matters like capacitors and contactors; it seems they dont know anything much about evaporators, wiring of the system and thermometers and thermostats etc.
My capacitor lasted over 27 years. it started to develop a mushroom on the top of the capacitor!! They're cheap to replace. The only thing wrong with my airconditioning unit now, is fan motor is bad!!
Tool List- www.amazon.com/shop/acservicetech
Support- www.patreon.com/acservicetech
For those that are looking for the tools used in the videos: (Linked Below)
Here is a link to the UEI DL389 Multimeter used in the videos- amzn.to/2av8s3q
Here is the link to the Fieldpiece SDMN6 Dual Pressure Testing Manometer with Pump-amzn.to/2jyK5Ka
Here is a link for the Supco Magnet Jumpers amzn.to/2gS4h6z
Here is the link for the Irwin Wire Stripper/Cutter/Crimper amzn.to/2dGTj2V
Other tool links can be found in the video description section.
ACSERVICETECH is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com.
I put this video out there to give visual, temperature, and noise cues to point you speedily in the right direction during diagnosis. I hope you enjoyed the video!
Great videos! Keep 'em coming!
Will Do!
Excellent video.
Thanks!
Great video. Thanks for posting!
Thank you!
One way to identify the location of your connection on your cap is the compressor connection will usually have 3 male spade connectors, the fan will have 2 and the common will have 4 .
Yes absolutely, fan sometimes has one but usually two, thanks Sean!
Great video keep them coming.
Thanks
Thanks!
thank you I was expecting all the above but I don't know I just wanted to hear it from a second source
Sure no problem!
thanks for your help.. one last question does it makes a difference if the motor is calling for 370vac and the capacitor i have is rated for 440vac..
If the motor says 370v and the cap is 440v, it is ok. If a motor said 440v and the cap was 370v then that would not be good.
Would a bad capacitor cause the a/c unit fan blade go at a slow spin
It could yes but it may also be the motor or bearings of the motor, thanks
Nice job ACSERVICETECH!!! I wanted to ask and get your thoughts since I am a new tech. I carry a lot of manuals with me and notes on different trouble shooting issues and operations etc. Does that make me a lesser technician because I have to look things up if I cant remember or just want to be sure? Just wanted to hear your thoughts, because I really think you are a great teacher. Thanks again.
I know other business owners that have to stop and look things up. You can't know everything about everything so it sounds to me that you are just being thorough. Sounds like something a wise person would do. Thanks!
Thank you very much sir, I appreciate your thoughts.
Get a tablet dedicated just for service. Start saving .PDF manuals and cheat sheets. There are lots of apps for reference and diagnosis as well. If you move up to smart probes better to read them from a tablet which you can leave at the unit instead of using your phone.
Not pointing fingers ok because I appalaud you...just saying overall
Hey Vjn, This was just a video for beginners, in fact I don't think I was using a mutimeter with this one. Have you seen any of the troubleshooting videos such as liquid line restriction, low airflow, variable speed, psc and ecm- non variable blower troubleshooting? Thanks and I just did one on the potential relay, thanks
AC Service Tech LLC awesome! No I did not see those videos my good sir, however, I know you can agree on many things that weren't executed properly by AC Techs. I mean many times I hear mixed up information on basic manifold gage readings regarding temperature/pressure association. I can't recall the last time I saw an AC tech checking for refrigerant leaks before adding more to the system. I guess everyone's approach to this trade differ somewhat, even though the AC system works better with only the correct appraoch at all time worldwide.
Have you seen the videos I did with the ultrasonic leak detector. I love that tool! It has really been very helpful compared to heated diode and other methods, thanks
I just replaced one that was out tolerance after checking running unit.
Was the resistance too high or low?
Do you have to short out a capacitor that has mushroomed? From what I understand, the mushrooming is like a fuse and disconnects voltage.
Great Question! After you shut the power off, you don't need to really spend much time shorting out a run capacitor in general because when the compressor shuts off, it uses the voltage from the cap that was stored. You need to short start caps without resistors because they are taken out of the circuit with voltage stored.Regardless just for the accuracy of the reading, if there were a very tiny amount of voltage left in the cap scraping it before testing will give you the best result. Yes you are right though! Thanks for the question!
i checked the capacitor it tested good.. fan motor is getting hot.. input voltage is around 242..
Is that the voltage while it is running too? You could megger the motor. It sounds like the windings are breaking down. Make sure the capacitor is the exact correct size that the motor is calling for. Look on the side of the motor at the rating plate for the correct cap size, thanks
I saw something werd to day variefyed that there is a piston in the air handler and my wet bulb is 57 degrees and a dry bulb 75 degrees my target sh is 7 degrees but my problem was I had a 1 degree sh but I can't remove refrigerant to make the sh go up or the suck temp will be below freezing
hight sh add
low sh remove (right)
This is correct. What about the airflow on the evap coil? If there is more airflow then there would be more superheat. A problem could be restrictive filter duct, obstruction, blower motor tap speed, dirty coil or it is actually possible that the orifice size that the installer put in is for a unit that is larger in btu capacity.
my condensor fan motor stops running after 5 mins... can u help me out
Did you check the capacitor, what is the input voltage, is the motor getting very hot?
Hey that's kool but capacitors go bad because of many reasons...1,low refrigerant in the system can cause stress on the capacitor due to overwork 2, the incorrect gage wire that support the capacitor from the contactor can result in damage also as a result of stress 3, the capacitor might be too small for the unit its feeding 4, the condenser might be clogged and therefore needs cleaning which burns more electricity in order to dump heat and thus put stress on its components...I can go on and on. I realize nowadays these type of AC Tech. Only focus on small matters like capacitors and contactors; it seems they dont know anything much about evaporators, wiring of the system and thermometers and thermostats etc.
My capacitor lasted over 27 years. it started to develop a mushroom on the top of the capacitor!! They're cheap to replace. The only thing wrong with my airconditioning unit now, is fan motor is bad!!
27 years is very good!
I installed 2 capacitors within a year