LENNOX Package RTU Not cooling, step by step troubleshooting

LENNOX Package RTU Not cooling, step by step troubleshooting.

[@roqueherrera8471]

Thanks my AMIGO that was one of the best step by step troubleshooting

[@Learnhvac.]

Thanks

[@Kaapee]

Nice video, watching from Norway, hope for more videos!

[@Learnhvac.]

Thanks please share it to your friends

[@jrh86]

Very informative and educational thanking you for sharing your knowledge.

[@Learnhvac.]

Thanks

[@jenniferm5375]

Thank you for the video very well explained and to the point! New subscriber here, keep up the good work and thanks again for inspiring the newcomers

[@Learnhvac.]

Thanks

[@jamesortolano3983]

I appreciate LENNOX equipment, nd this was a very good video on rtu’s .
Gonna subscribe thank you for the editing, content , and posts

[@Learnhvac.]

Thanks

[@roqueherrera8471]

👏🏼

[@harbbains5718]

Excellent video Bro👏👏
Thank you so much!!!

[@Learnhvac.]

Thanks

[@MariosACandRefrigeration]

thanks for sharing.

[@Learnhvac.]

Thanks

[@zekenzy6486]

Great video. Good Job and Nice Work. Thank you for sharing. May I ask, is it high pressure switch on liquid line was bad ? If it, how many pressure that switch will open ?

[@Learnhvac.]

Yes that was pressure switch on liquid line, that should close on high pressure as ambient temperature was 75F should be close just like other pressure switch for different fan

[@joseantoniopadronhidalgo8016]

I had the same problem with more than 20 units at the same time and I thought was normal 😅 due all motors same position were stopped ! My question is why all units with the same problem ? LPS bad in all of them or just the board know when send the 24v to this motor in particular

[@Learnhvac.]

Well that depends what is ambient temperature is if it is too low then it takes some time to build up pressure in condensor coil and to activate fan motor relay, if it is too hot then fan starts right away just like other fan in the video was starting, board has nothing to do with it

[@tyleramorin89]

I’m confused why the problem couldn’t have been the relay itself? Because it was bypassed and the motor started

[@Learnhvac.]

That was not relay it was pressure switch actually, and I start from the component which is not working, and Traced it backward for root cause

[@joseantoniopadronhidalgo8016]

The relay was working properly but not receiving 24v to activate it for that reason the motor not working. 24v was controlled by LPS in this case.

[@Learnhvac.]

@@joseantoniopadronhidalgo8016 yes

[@yoyoman3386]

Sorry, a newbie here. I understand that the relay was working but I don't get how you knew it wasn't the relay by moving the black wire from lower terminal to upper terminal.

[@Learnhvac.]

@@yoyoman3386 ok I check step by step, condensor fan motor was not working I checked motor, it was ok then supply motor voltage by bypassing relay which was by moving black wire, motor started next step was why relay wasn't working so Traced relay through wire diagram, and found pressure switch was faulty