Customer Success Story: Electrical Diagnosis & Repair – HVAC Repair McKinney, TX

📍 Location: McKinney, TX 75072
🏠 Issue: HVAC System Not Turning On – Blown Fuse on Furnace Board

A homeowner in McKinney reached out after their HVAC system failed to turn on. Our technician inspected the equipment and found a blown low-voltage fuse on the furnace circuit board. After replacing the fuse, the system started—but failed again within 30 minutes.
We didn’t stop at just replacing the fuse. Our team conducted a full diagnostic of the low-voltage system, including:
• Wiring inspection
• Transformer and relay checks
• Zone control evaluation
• Contactor testing
The root cause? A burn mark on the condenser contactor coil, which caused intermittent shorting and triggered the fuse to blow randomly.

🔧 Our Philosophy:
We never take shortcuts. A blown fuse isn’t just a minor issue—it’s a warning sign. At Greentech, we always find the true source of the failure before closing the job.

✅ The Result:
• Faulty contactor replaced
• System restored to safe, stable operation
• Prevented further electrical damage
• Peace of mind for the homeowner

📞 If your system keeps tripping or losing power, trust Greentech Engineering Heating and Air Conditioning to diagnose it right the first time.