Air Conditioner error codes

2 documented codes across brands, with ranked causes and repair costs.

Carrier Air Conditioner — Not cooling Carrier AC Not Cooling: Causes, Fixes & Repair Costs Carrier AC not cooling? Causes include dirty filters, low refrigerant, failed capacitors and frozen coils. DIY checks plus repair costs from $0 to $2,500+. Goodman Air Conditioner — Not cooling / no codes Goodman AC Running But Not Cooling: Causes & Costs Goodman air conditioner running but not cooling the house? The causes ranked by likelihood, safe checks you can do, and honest repair costs.