Atwood Furnace Troubleshooting

Written by misty faucheux
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Atwood Mobile, headquartered in Elkhart, Indiana, produces outdoor, marine and mobile home/RV appliances and accessories. The company offers different models of mobile home furnaces, ranging from standard to high-end devices. They are designed to be lightweight, and easily installed and maintained. If you are experiencing an issue with your Atwood furnace, try troubleshooting the problem yourself before you call for service.

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Burner Issues

If your burners won't ignite, connect them to a power source and try again. Check your circuit breaker and reset if tripped. Change out any blown circuits. Look for loose or disconnect wires and reattach. Replace any frayed or broken wires. Always properly ground your furnace before trying to light your burners. If your burners won't stay on, check your gas pressure and turn your gas valve to the "On" position. Clean a blocked exhaust and plug contacts, and tighten your combustion air wheel if loose. Change out a broken heat exchanger.

Blower Issues

If your blower runs, but it doesn't ignite, use a polarity tester and fix if polarity is reversed. Connect the blower to a power supply and use the correct amount of gas pressure. Check your main burner opening and remove any obstructions. Clean burner heads. Always replace any broken or corroded parts. If your blower is running all of the time, adjust your thermostat setting to a lower set point if your set point is too extreme. If the blower and burner shut off at the same time, check the relay, and replace if not working properly. Correct any wiring issues.

Not Enough Heat

Try raising your thermostat to a higher setting if you are not getting enough heat. Check your Atwood furnace size and replace if the furnace is the wrong size for your living area. Check your vents and remove any obstructions from vent openings. Clean the filter if dirty. Check your thermostat and replace if faulty. Check your pilot light and relight if out. If pilot light won't light, clean the pilot assembly and replace any broken or defective components, including thermocouples and sparkers.

Additional Concerns

Sooting is caused when you have a yellow as opposed to a blue flame. If you see soot on your furnace, check your gas pressure and increase if necessary. Clean your burner heads and heating chamber, and increase voltage if power supply low. Change out your thermostat, wires and/or relay if your fan continues to run even when the thermostat is off. Tighten your motor mounting if the blower is noisy, or replace motor and/or blower wheel.

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