HVAC Know It All

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Most smart home hacks start with a stolen password. Most shop losses start in the inbox. Here's how residential HVAC shops close both doors.

Internet-exposed controllers, default passwords and old firmware. What commercial techs need to fix, and where their job ends.

Run capacitors heal themselves until they can't. Heat and voltage decide how fast. Here's how to read the evidence.

Manifold pressure is the adjustment. Clocking the meter is the verification. Here's the five-minute math.