Rheem condenser low voltage issue

[rcflightcrazed]

Ok, I've been working on ACS for close to 30 years.  This one has me scratching my head.  New condensing unit was installed last year, has been running great.  Stopped working, I found the transformer was burned out, replaced it.  Now, I have my 24v outside, but as soon as I hook it to the contactor, it drops the voltage to about 1v. Installed new contactor, same thing, even with no high voltage wires hooked up.  T stat was replaced too, just because it was old, and I wanted to eliminate it as an issue.  Any suggestions?

[rcflightcrazed]

Got it!  Brand new contactor bad, out of the box.  Had me pulling my hair out! Up and running, 👍🏼

[Admin]

Good job.  That would have been my guess but you beat me! 

[hvactech83]

yes this happend to me one also with brand new contactor .

[Hvacpimp]

Good to know with the upcoming ac season. Thanks for the heads up!