Best Temperature Control in Dallas TX

Technician was to perform free maintenance on a system I paid to have installed last year. My downstairs unit was cycling on and off. Rather than diagnose and repair it, the technician tried to upsell me on a new system ($12/$15/$20K) or offered $5K of repairs to the old system. He showed me pictures of mold in my attic and said I had no drainage pan under the old system, both were scare tactics and lies. I opened the furnace, read the troubleshooting label, determined a fuse was blown and replaced it for $3.50. The system is running fine now. I would not recommend this company for residential repairs as I find their business practices predatory and unscrupulous.