Carrier status code 13: the lockout that follows a limit or rollout switch

What Does Error 13 Mean?

Carrier lists status code 13 as a limit or flame rollout switch lockout. The control had already seen that circuit open, reported it, and then decided the condition had lasted long enough to stop trying. A lockout is a deliberate refusal to restart, so code 13 is a stronger statement than the open-circuit code that precedes it. Applies to: Carrier deluxe two-stage gas-fired induced-combustion furnaces with PSC or ICM blower motors, as covered by troubleshooting guide 58-3T This reading is taken from Carrier troubleshooting guide 58-3T, which covers deluxe two-stage gas-fired induced-combustion furnaces with PSC or ICM blower motors. Other Carrier furnace controls, and the same numbers on Bryant or Payne equipment, are read from their own literature. Confirm the model on the furnace rating plate first. Owner-safe checks: With the furnace switched off, inspect the return-air filter and fit a clean one of the specified size and type if it is loaded. | Walk the house and confirm that supply registers and return grilles are open and not covered by furniture, rugs, or stored items. | Record the flash pattern through the sight glass without opening the blower door, along with the date and time of the lockout. Qualified technician: Identifying which safety device opened, measuring temperature rise, and inspecting combustion and venting are licensed gas-furnace tasks. | Treat soot, scorching, an odour of combustion products, or a carbon monoxide alarm as an immediate stop. Get fresh air into the space, keep the appliance off, and use the emergency number your gas supplier publishes.