Air Works installed my Carrier furnace in 2006. In 2011 they came and replaced failed primary and secondary heat exchangers. Exchangers were covered under warranty. They charged me $200 in labor. Throughout the service call, I listened to the technician saying the F word so loud it echoed through my house, repeatedly. He was upstairs, my children and I were downstairs. Furthermore, I could hear him kicking at the furnace while swearing. When the technician completed his work, he asked who installed the furnace horizontal. I replied that his company did the installation. 1-8-14 I called a different local heating and cooling company because my furnace was leaking 1/2 a cup of water every time it turned on. They water had a propane odor. They offered to have a tech come out in an hour, but recommended I contact the installer in case work was covered under warranty. Due to my past experience, I was hesitant to call. When I contacted Air Works, they told me it would take a couple of days for someone to come out. Since the entire condensation pan was filling in a 6 hours, I decided the problem could not wait and called the other local heating and cooling company. They came out within two hours. They diagnosed my furnace with failed primary and secondary heat exchangers, soot in burners 2, 3, 4 along with water leaking from unit into condensation tray. He said the problem should not exist. The heat exchangers last 25 years. He recommended I contact the local Carrier representative and have Air Works come out and repair the furnace under warranty. I contacted Air Works to report what the technician found and request service. I was told it would cost me at minimum $130 to have their tech come out and look at the furnace. They did not accept the diagnosis of another company. Since I already paid $160, I did not want to pay another $130 for a problem that should not exist. I contacted Carrier and spoke with their local representative. I was informed there was a class action settlement for my furnace in 2006 because of failed heat exchangers. Conditions of the settlement provided replacement of the heat exchangers and labor. Over the next hour, he asked me several questions. In his opinion, failure of the heat exchangers again in 3 years could be due to poor installation. He expressed frustration that Air Works charged me for labor when they were paid for labor under the class action settlement. He recommended I contact another repair company. Another company came out for 8 hours and serviced my furnace with a long list of problems. They replaced the primary and secondary heat exchangers and burners, installed MISSING air baffle, installed MISSING restrictor plate, secured heat exchangers to back latch tabs by blower motor because it was UNLATCHED and adjusted WRONG gas pressure. During installation or previous repair, my pressure was set for natural gas not propane. I live in the country. EVERYONE has propane. Needless to say, in his opinion the failure was due to poor service repair by Air Works. When his work was completed, I was only charged $200. $120 of it was for the burners not covered in warranty. The remaining $80 was for additional labor. They did not charge me a fee to just come out and look at the furnace. As such, I forwarded the information to the Carrier representative to address the problem. I am in the process of writing a letter to AIr Works. From my understanding setting the WRONG gas pressure is failure of basic 101 heating and cooling education. I do not recommend Air Works for any heating repair or installation.