Our local plumber installed an American Pro Line Water Heater in October 2010. It worked great until December 2013, when the pilot light stopped staying lit. The plumber who installed it came out 5 or 6 times, replaced the thermocouple, charged us a total of over $400, but then it finally started working. Hooray! And, then, in July, the problem started again. I called Pro Line support, was sent directions on what to do if it wouldn't stay lit, but the unit still wouldn't stay lit. The same plumber came back and was baffled. He said in his 40 years as a plumber, he has never had this much trouble with a water heater. He tightened up some parts, checked to make sure that everything else was working, relit it…and it worked for 3 days. Now we have to light it about twice a day manually. I called Pro Line, asked if we could get some help, and was told to call one of their certified repair people, a & E. I had tried that last week, but they couldn't come for 5 days and could give me no estimate of cost other than the $89 to show up, which would be applied to the cost of repairs. They couldn't give me an hourly rate or any estimate. I was talking to someone somewhere in the U.S., without the ability to talk to a local company or directly to the plumber, so I didn't use them. At the end of our conversation today, the Pro Line woman told me that she would call an hvac specialist, as she decided that it doesn't sound like a water heater problem. I asked her why the water heater would have worked for 3 years initially and then 6 months if it was a problem with venting or plumbing. She said that "other things" could happen, but couldn't explain what those were. After almost four years and $1400 into this water heater ($1000 for original installation and unit, $400 for repairs in December/January), we now have to buy a new water heater unless we want to lie down on the floor twice a day to light our pilot light, and never know each morning whether or not we'll have a hot shower. Never, ever buy an american pro line water heater!