We realized our 2005 Lennox central air conditioner was not working after switching it on the first hot day of summer. I made an appointment with Culzac a few days later. The technician showed up punctually and quickly diagnosed a dead capacitator. He had the part on hand and proceeded to replace it after explaining the problem to me. He then checked the furnace and hosed down the exterior of the a/c unit to remove dust and leaves. In fact, he did a whole bunch of things at no extra charge to ensure our system would work efficiently, and listed them clearly on the invoice so I would know the scope of his work. Our a/c is working really well now. I would not hesitate to call Culzac again.