Rooftop Unit Not Cooling-HVAC Service Call

In this video we check a carrier rooftop unit that is not working. We test the electrical components on the system and replace the issue. Please like and subscribe! Enjoy

[@thomasmclaurin7036]

Fan capacitor. I spin the blades to check also. With no former training, I found out that little trick just by trial once. It's a handy tip to know that the motor spins freely and hasn't seized up.

[@michaelthurber2660]

Actually that can tell you alot. Cap usually, but seized, you would hear it....

[@murkyturkey5238]

Lol I’m sure he knows that trick as well

[@robertmilligan3831]

Thanks for this video! We have a rooftop A/C on a 4-story condo building with 55 apartment units and the cooling is poor, even on 80-degree days. I know enough not to call a service company and speak your language, well almost!

[@irisnavarro3162]

awesome video thank you. continue to learn and grow. great job!!

[@user-xd9im4td1f]

I went to school for HVAC, and I have field experience. One of the reasons a capacitor could go bad is the condenser fan motor could be going bad.

[@michealolson7217]

Thanks for the video

[@mohammadmahdawi4821]

Appreciate your help
More RTU please

[@chrisd933]

Great video

[@SoGQue]

Great work🙌🏾

[@HVACTechTips]

Thank you 🙏

[@wildoutrudeboy]

It looks like you are connected to the discharged line coming out of the compressor, which is a high-pressure vapor.

[@llesco693]

My ac roof is goin on and off on the compressor but the fan blower is working well. Where should I start with?

[@alvarolucio8264]

Parabéns pelos seus vídeos. Estas placas deste equipamento são iguais para todos os modelos de ruf top? O seu manômetro que vc acompanha pelo celular, qual modelo dele? Aqui no Brasil nunca encontrei deste modelo!!!! Parabéns

[@trendingnow3973]

For I taking RTU Data for analysing,I seen rtu give 255 value continuesly,Can you explain why this happend.

[@ianwalbert8727]

looked like u hooked to the discharge instead of liquid line. thought u cant measure subcool that way

[@murkyturkey5238]

Some units only have one port

[@juanrobles9511]

High Subcool and High Superheat indicates a restriction in the metering device along with dirty condenser coils. Did you replace filters? Good video✌️

[@chrissipple1018]

The sub cooling was high because he was checking the discharge pressure and not the liquid line pressure. He would need to install a liquid line pressure line tap to read the sub cooling. Carrier does not install a liquid line pressure line fitting, to much money.

[@thepoopsoup]

I have never heard a tech say there's always a reason why a capacitor goes out.

[@Brisket9392]

They do just go bad. The plates deteriorate. Heat will kill them faster.

[@fragartyparty]

A tech once told me that back in the day capacitors were huge and could outlast an AC unit. Then one day, capacitors got really small and their lifespan was greatly reduced.
Planned obsolescence

[@bb3283]

AC tries to turn on and buzzes for 10-15 seconds, then it turns off. No fan. Nothing…. Tried turning it from ON to OFF a few times, and still have nothing going on when I try it.

[@Brisket9392]

Contactor would be the first thing I check.

[@shannonstiles9838]

🇺🇸

[@Al-gr2pg]

Always change the fan. Usually the fan is on the way out

[@user-rn4ko9rx7z]

unit looks old, that has 410A?not r22

[@michaelthurber2660]

Please get in the habit of totally disconnecting the cap before reading. Same with compressors.

[@murkyturkey5238]

Lol it doesn’t make a difference and compressors, you can check the wires at the same time

[@mrrichards6007]

Is it standard for the compressor to get really hot to the touch?

[@murkyturkey5238]

Probably not, check the charge

[@decal4707]

scroll compressors tend to get hot to the touch on the bulbous top section