Carrier Code 31, Post Duct Cleaning. - HVAC - DIY Chatroom Home Improvement Forum

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Old 10-18-2011, 04:27 PM   #1
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Carrier code 31, post duct cleaning.

What a terriffic website!

Tried searching for help, but thought maybe my case was a little different. My carrier furnace is yeilding a LED code 31 after multiple turnoffs and turnons. Tried fuse switching and had some duct cleaners out who cleaned out a lot of stuff (recently flipped house). Fan works, AC works, but flames wont ignite. Im not a proffessional, nor do I remember the cleaning crew going on my roof (though the exhaust and intake might be on the side of the house under the porch). Should I look into calling a professional, ie for a new pressure switch, look at the filter, or take a whack at the exhausts and intakes on the roof or under the porch (behind some cheap wood grating)?

Thanks, and again what a great community!


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Old 10-18-2011, 04:35 PM   #2
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Try this post.

Carrier 58MXA Code 31 Problem



**Always kill the power ** Hot air rises, but heat will always move from higher to lower temperatures. ** Real man shoot in manual. ** If it ain't grounded, it ain't dead.
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Old 10-18-2011, 04:44 PM   #3
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thanks! my tech skills are not great, but as far as compilling a list of suspects, I'm on my way!
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carrier , code 31 , furnace , pressure switch

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