Carrier error codes

5 documented codes with ranked causes, repair costs, and step-by-step guidance.

Carrier Furnace — Code 13 Carrier Furnace Code 13: Meaning, Causes & Fixes Carrier furnace Code 13 means a limit circuit lockout. Causes: dirty filter, blocked vents, bad blower. Fixes cost $0 DIY to $600+. 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+. Carrier Furnace — Code 31 (pressure switch) Carrier Furnace Code 31: Causes, Fixes & Costs Carrier furnace flashing code 31 (pressure switch/inducer fault)? What it means, causes ranked by likelihood, safe checks, and repair costs. Carrier Furnace — Code 33 Carrier Furnace Code 33: Causes, Fixes & Costs Carrier furnace flashing code 33 (limit circuit fault)? What it means, the causes ranked by likelihood, safe checks you can do, and repair costs. Carrier Furnace — Code 34 Carrier Furnace Code 34: Ignition Proving Failure & Fixes Carrier furnace Code 34 means ignition proving failure. Causes, safe checks and pro fixes — flame sensor, gas valve, $0 DIY to $600 repair.