Boonstra Heating and Air Conditioning

We currently have a maintenance plan with Boonstra. Our contactor shorted out recently on a 3 year old unit under warranty. We paid 69.95 for a service call, and at least they showed up quickly. After an hour of diagnostic, he figured out the problem and proceeded to charge us 310 dollars to install a 20 dollar part in minutes. He would not honour the warranty as he said they were not the original installers and we would have to contact them. We do not know who the original installer was, as we only bought the house after the fact. Last year our unit froze, and we went through the same process with boonstra. We were told it would be 800 dollars for them to just try and figure out the problem, and would likely need a new unit! It was only 2 years old!!!! After contacting another company, they figured it out and fixed it at no cost. I feel that Boonstra technicians are more focussed on big sales rather than honest repair work, and while we should have learned from our experience with them last year, we definitely have this time around. We will be cancelling our maintenance plan.