Lennox Central Air Conditioners Leak

by Al
(Orlando)

I bought a new house in Orlando in which the builder (Lennar) had installed two separate Lennox central air conditioner. We have Lennox unit for the ground floor and the other for the first floor. Within two years there was no cooling air coming from the first floor Lennox ac units.

The ac technician told me that gas had leaked causing low suction pressure. The pressure was 80 psi which he said was low. I do not understand why Lennox air conditioners go bad within two years and I had to spend hundreds of dollars fixing it.

Is Lennox central air conditioners are really bad and have manufacturing defects? The units go badly as soon as the warrantee period ends. Why the Federal and State regulators do not take appropriate actions against Lennox Company?