Cardinal came out based on a claim to our homeowners insurance due to a leak. The tech was knowledgeable and quickly diagnosed the problem. As part of the visit they also checked freon levels in the A/C as that was involved in the leak. However, the bill was quite high given that it was only about an hour visit and the tech was so busy they couldn't do a full tune-up on the system so I will have to pay for another visit. It happens but it just seemed that for the work that was done, the cost was a bit high.