THERMAL SHOCK – OCCURS WHEN REFUELING WITH WOOD CONTAINING MOISTURE EITHER ON IT OR IN IT. MOIST SMOKE IS SENT TO THE COMBUSTOR WHEN THE BY-PASS IS CLOSED AND THE RESULTS ARE THERMAL SHOCK AND CRACKING OF THE SUBSTRATE. A CONTINUAL PRACTICE OF THIS WILL CAUSE THE COMBUSTOR TO DETERIORATE.
FATIGUE – THE CATALYTIC COMBUSTOR HAS A SIX-YEAR (6) LIFE EXPECTANCY WHEN USED ACCORDING TO THE STOVE OWNER’S MANUAL. ALTHOUGH, SOME COMBUSTORS HAVE OPERATED WITH EFFICIENCY FOR AS HIGH AS TEN YEARS, THE COMBUSTOR’S LIFE IS BASED ON THE STOVE OPERATOR, MAINTENANCE, FUELS USED, AND THE STOVE MANUFACTURER’S DESIGN.
MISHANDLING – OR ABUSE TO THE COMBUSTOR. A FEW EXAMPLES WOULD BE … DROPPING IT, USING ABRASIVE TOOLS FOR CLEANING IT, USING HIGH PRESSURE AIR TO BLOW THE CELL FREE OF ANY FLY-ASH BUILD-UP, USING CLEANING SOLVENTS TO CLEAN IT OR PERHAPS BEATING ON IT TO REMOVE IT FROM IT’S HOLDING DEVICE.
DIRECT FLAME IMPINGEMENT – FLAMES BURNING FOR LONG PERIODS OF TIME DIRECTLY INTO THE COMBUSTOR WITH THE BY-PASS OR DAMPER CLOSED WILL CAUSE THIS. ALLOWING THIS TO HAPPEN WILL CHANGE THE CHEMICAL MAKE-UP OF THE CATALYST AND CHANGE IT’S REACTION AS WELL.
FLAME IMPINGEMENT ON A CONTINUAL BASIS WILL CAUSE THE SUBSTRATE TO BREAK DOWN. SOME OF THE REASONS FLAME IMPINGEMENT OCCURS ARE OPERATING THE STOVE WITH THE FIREBOX DOOR AJAR OR THE ASH PAN NOT CLOSED TIGHTLY. OTHER REASONS MIGHT BE THAT THE DOOR GASKET NEEDS REPLACED OR THE AIR INTAKES ARE LEFT WIDE OPEN AFTER THE BY-PASS HAS BEEN CLOSED. UNCONTROLLABLE DRAW OR FAST DRAFT CAN BE CONTROLLED WITH THE USE OF A BAROMETRIC DAMPER.
POISONING – THIS HAPPENS BY BURNING MATERIALS OTHER THAN SEASONED DRIED WOOD. FOREIGN MATTER SUCH AS GARBAGE, PAINTED WOOD, LARGE AMOUNT OF COLORED PAPER, CARDBOARD, RUBBER, PLASTIC, PANELING WITH GLUE, OIL PRODUCTS AND SO ON WILL EVENTUALLY KILL THE EFFICIENCY OF THE CATALYST.