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r/HomeFixers crowdsources a guide to diagnosing a dead furnace before calling a pro
The flowchart in the top comment has saved people hundreds of dollars.
A 2,300-comment thread turned into a community-edited troubleshooting flowchart. Several HVAC technicians contributed and flagged which steps are unsafe for DIY.
Read it at the source
Cascadic Analysis 2
Product SparkGuided repair with a "stop here" line
What product does this inspire or accelerate?
The flowchart's best feature is where it tells you to stop and call someone. Apps rarely do that.
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Wade InCheck your furnace filter this weekend
How can you try this yourself this weekend?
Step one of the flowchart, and the most common fix.
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Rabbit Holes
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How a modern furnace starts upEach step, and what can fail. · The Understory · Swim · 30 min7