Marathon Service Co

Initial install was in May of 2013 for air conditioning. There were some problems with functioning so I had to recall the company. They sent someone out within a day who fixed the problem at no additional charge.
When heating season began in November, heat wasn't working correctly. They again sent a tech in a day or two to get the heat working properly, again at no charge.
Ideally, it would have been nice for them to get it right the first time. But, they stood behind their work and fixed the problems.
Their solution was also less expensive than other companies who wanted to do a lot more (unnecessary) work.

They are great. They were prompt and the quote was very close to the final price. Everyone was professional and answered all of our questions.

When my husband hired them to install a hot water heater, they didn't send a plumber, so the heater exploded in the middle of the night. They refused to replace it because they claimed we must have done something wrong. When we checked our crawl space, we found they left the old heat pump there. He reluctantly came to pick it up. He tried to swindle us. He claimed he would give us a discount because the company was offering a rebate. We had to call him many times to get the rebate. We had to call another company to honor the warranty when the units stopped working after five years. It was a terrible experience overall.

Marathon Service Company did a great job repairing our heating system that was not working on the second floor of our home. They came out and inspected the problem and provided an estimate. He diagnosed the exact problem that was going on with the unit. The technician was prompt and worked two hours to figure the problem out and did not charge me for that service.