Forgive me, I know little about HVAC. I bought a new construction and I was foolish (not to mention clueless) about the HVAC installation. It is my first home.
One of my two AC units broke within two years. I tried to contact the initial installer but they refused to respond to any of my calls. They also would not respond to calls or mail from the BBB. The attorney general would also not return my calls. So I was forced to have another company come repair this.
This other company replaced the compressor and got things working again for me. They were able to cover the compressor under the warranty from the manufacturer so I wasn't too upset. However, within 2 years, this unit has broken down for the second time.
I had yet another company come out to look at my system. He said that my current installation is illegal with respect to federal law. He said that my AC unit was oversized by half a ton for the amount of air my ductwork can handle. And he said that my ductwork was 'mickey mouse' stuff done obviously by a plumber (whatever that means).
My question is this: Is there something the original installer could have done incorrectly such that my AC cannot operate as installed? What kinds of things do I need to investigate to determine if they installed my system in a negligent fashion?
Please educate this woefully ignorant HVAC consumer. Thanks in advance for your help.