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Smells like something's burning!

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Serious. At about 8pm this evening, we started getting a strong smell of paper burning permeating through the house. Checked every room, no active flames, no smoke, smell is really strong around main heating ducts. Checked heating system (gas, fairly new) in the attic, no smell in attic, flames are strong and blue when checked through viewing window. Definately coming from heating ducts. What else should I check/do?

 

There is a bit of a dust/lint-type buildup on the duct's louvers, is this OK? Only got the house in July, so stuff is still a bit foreign. Any advice appreciated.

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Had the same situation here half an hour ago.  It's the auxiliary heating element that kicks in when it gets too cold for the heat pump to generate enough heat.  It's burning off dust and lint that accumulated in the heating element since last winter.  If you have access to it, it's a good idea to check it and make sure you don't have a fireball starting in your heater.  

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Had the same situation here half an hour ago.  It's the auxiliary heating element that kicks in when it gets too cold for the heat pump to generate enough heat.  It's burning off dust and lint that accumulated in the heating element since last winter.  If you have access to it, it's a good idea to check it and make sure you don't have a fireball starting in your heater.  

Yeah probably this. Its really cold here. Try and check it if you can.

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Gas furnace would not have electric auxiliary heat.

 

Open blower section and make sure blowers not heating up.

With an attic duct system it could be sucking in odors from outside if return duct is not 100% sealed. Also sucking in cold air in winter and hot air in summer

Edited by ted527

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I had one one time the original installer had left the instruction packet on top of the heat exchanger, but they had smoke and flames so that might not be your problem, probably just dust and stuff burning off

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