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Payne Trouble Code 33 And 13

These codes may require the limit or flame roll-out switch to be reset. The two switches are located above the three burners. If the flame "rolls out" instead of into the heat exchanger, the sensors detect the heat and shut off the gas. Manually reset the sensor by turning off the furnace and pressing the center tab down on the back, upper side, of the switch.

These codes may also mean dusty burners. Clean by using turning off the furnace and blowing compressed air into the burners. A shop-vac that can blow air can be used as well.

Ensure that there are no closed vents which would restrict air flow. Clean or replace all the filters.

Additionally, the flame sensor may need to be cleaned. Use steel wool. Fine sand paper may be used, but you must remove the sand paper residue with a damp paper towel.