I had the Lennox XC15 installed just last Thursday and noticed today
that even though the A/C was on according to the thermostat display,
the air coming out from the vents were nowhere nearly as cool as it
had been. I went outside to check up on the A/C and noticed that
there was absolutely no noise or humming coming from it. And there
was no warm air coming out of the top of the A/C either.

So, I called the installation company and the owner himself came out
to take a look. Turned out that the breaker in the A/C unit itself
had gone off. I'm not talking about the breaker on the power panel
for the house, but in the unit itself.

For the installation last week, the electrician had to access the
power panel in the house and in it, he had installed a new breaker for
the A/C electricity line and fed a new power line from it. The
breaker for the A/C in the power panel in the house was just fine.

Just in case you're wondering, I don't have the temperature set low at
all. I have it set at 24C/75F. It's still comfortable for us at that
temperature in the house, so, that's what I have it at. So, it's not
as though the A/C unit had been under alot of work at all, but still
had the breaker go off like that.

So, the owner reset the breaker in the A/C unit and told me to call
him if it happens again and will send out the electrician to run some
tests to find the cause of the problem.

I have this suspicious feeling that it will happen again and was
wondering if anyone in here might have an idea as to what might have
caused this brand new unit's breaker to go off like that.

My A/C unit is on the side of my house which ends up being in the
shade most of the time during the day.

Can this be just a bad breaker in the A/C unit? Or, something more
serious? Anyone? Thanks for your time and courtesy.