33 (Alt)
Keeprite Flame Rollout Condition

On some Keeprite models, code 33 may indicate flame rollout switch open; burners shut off quickly after ignition.

Advertisements

Safety Warning

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

Advertisements

Possible Causes

Blocked heat exchanger or flue, Cracked heat exchanger causing flame disturbance, Incorrect orifice size or overfiring, Blocked burner inlets

How to Fix / Troubleshooting

Critical safety warning: Flame rollout indicates combustion products leaving the burner area. Turn off gas and power immediately. Do not attempt to repeatedly reset rollout switches.

Steps (visual only):

  • Inspect rollout switches: Locate rollout switches near the burners. If manual reset type, note if tripped but do not reset until cause is found.
  • Check for visible blockage: Look for debris, rust, or collapsed metal in the burner area or flue connection.
  • Do not operate furnace: Leave the furnace off until a licensed technician inspects the heat exchanger, venting, and gas input.

This condition requires professional diagnosis. A cracked heat exchanger or blocked flue is a serious carbon monoxide hazard.

Advertisements

Repair Difficulty

Professional Required 5/5

Required Part

Flame Rollout Switch
Check Price on Amazon

We may earn a commission from links on this page.

Advertisements