# How Do You Test When My Furnace Won't Light a Duo Therm Trailer House?
If you live in a trailer house, mobile home or drive a recreational vehicle, you might use a Duo Therm furnace to provide heat. But just like a traditional home furnace, it’s possible to have heat problems after your Duo Therm furnace ignites. Before you pick up the phone to call a professional HVAC technician, consider troubleshooting the problem yourself.
Things You'll Need
- Screwdriver
Instructions
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1
Check the power supply connection for your Duo Therm furnace. It should be plugged in to receive a 12-volt DC current so the battery can stay charged. Otherwise, the blower won’t operate at full speed and engage the combustion switch.
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Examine the fan motor for any burned or loose wires. You might need your screwdriver to access the fan motor or re-connect loose wires.
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Set your thermostat to a temperature above the ambient temperature and wait one minute. If the heat doesn’t come on, it’s possible that the fan relay is defective and needs replacement.
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