C0-210 English Instruction Sheet
Page
6
CO and Appliance Malfunctions
The following table identifies typical problems that can produce
high levels of CO.
Appliance
Fuel
Typical Problems
Gas furnaces
Room heaters
Oil, natural
gas, or LPG
(liquefied
petroleum
gas)
1. Cracked heat exchanger.
2. Not enough air to burn fuel
properly.
3. Defective/blocked flue.
4. Maladjusted burner.
5. Building not properly pressurized.
Central heating
furnaces
Coal or
kerosene
1. Cracked heat exchanger.
2. Not enough air to burn fuel
properly.
3. Defective grate.
Room heaters
Central heaters
Kerosene
1. Improper adjustment.
2. Wrong fuel (not K-1).
3. Wrong wick or wick height.
4. Not enough air to burn fuel.
5. System not properly vented.
Water heaters
Natural gas
or LPG
1. Not enough air to burn fuel
properly.
2. Defective/blocked flue.
3. Maladjusted burner.
4. Building not properly pressurized.
Ranges
Ovens
Natural gas
or LPG
1. Not enough air to burn fuel.
2. Maladjusted burner.
3. Misuse as a room heater.
4. System not properly vented.
Stoves
Fireplaces
Gas, wood,
coal
1. Not enough air to burn fuel
properly.
2. Defective/blocked flue.
3. Green or treated wood.
4. Cracked heat exchanger.
5. Cracked firebox.
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