FieldBench
Carrier codes

Carrier

33 / 13

Protect

Limit

Airflow or flame-containment. 13 is the hardened 33.

Walk 33 / 13 in Diagnose

5 plates — walk the one on the cabinet

First check

1 Airflow before you touch the limit

On Carrier 58CVA a limit is airflow or overfire until proven otherwise. Do not replace the limit first. Filter, blower wheel, A-coil, and the heat-speed setting for THIS motor (tap, model plug, or communicating CFM — not a sister SKU chart). Filter, AC coil on top, blower, Infinity heat CFM.

Expect: Rise in the rating-plate window. Static vs this cabinet’s blower chart.

The rest of the walkthrough is Diagnose.

On the plates

  • Infinity heat CFM (wall control / IFC), filter, coil. Not a 9-speed tap and not a TP6 model plug.
  • Rollout still manual reset — inspect exchanger before you reset.
  • Rise vs plate at the % the control is actually commanding, not ‘high fire’.
  • Infinity heat CFM, filter, coil, return.
  • Not a 59SC5 heat tap and not a 59TP6 model plug.
  • Rollout is manual reset — inspect exchanger first.
  • Filter, AC coil on top, blower, Infinity heat CFM.
  • Rollout: exchanger / burners / flue. Manual reset.

Plates that use 33 / 13

Same number, other makers

33 / 13 on Carrier is not the same code on these plates.