2025-10-06 – Weekly HVAC News : Fast way to find a 24V short

Last week centered on practical field issues and job trends. Remote-friendly HVAC roles kept popping up in the jobs threads, while service techs compared approaches to billing diagnostic time and using Bluetooth probes to set expectations with homeowners. Troubleshooting talk was strong—quick methods to track 24V shorts, trustworthy CO readings on furnaces, and whether particle counters help validate filter performance. Rounding it out, folks swapped notes on heat pump behavior around 40°F, plus a light thread about strip heat and bread that still managed to touch on load and control nuances.


This Week’s Hot Topics

2025-10-02 – Weekly HVAC Jobs: Remote roles are on the rise
Hiring managers are widening remote options for controls, design, tech support, and commissioning review. Useful if you’ve got strong software skills and want fewer windshield hours.
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Quick way to isolate a 24V short
A clean, step-by-step thread on pulling circuits, using inline fuses, and common pinch points so you don’t cook a transformer or waste an hour guessing.
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Reliable particle counters for filter checks
Techs compare handheld counters for verifying filter performance and IAQ claims—what’s accurate in the field and how often to calibrate.
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2025-09-25 – Weekly HVAC Jobs: More remote HVAC roles than ever
Follow-up jobs roundup showing which companies are leaning into remote and what credentials they’re asking for.
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When strip heat meets sourdough
A light read with a legit takeaway on using available heat and controls creatively—proofing dough without roasting the space.
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Who actually pays for diagnostic time
Candid debate on flat-rate vs. T&M, trip fees, and how to explain value so customers don’t think “free estimates” cover troubleshooting.
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Bluetooth probes that calm anxious clients
Using live readings to show system health, build trust, and reduce “it still doesn’t work” callbacks after you leave.
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Heat pump humblebrag at 40°F
Real-world COP, defrost behavior, and stat settings when the shoulder season makes systems look great—or not.
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CO numbers you trust on furnaces
What ppm thresholds trigger a red tag versus a warning, plus test methods that avoid false comfort.
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What Are the Must-Have HVAC Tools in 2025?
A practical list shaped by field use: vacuum rigs, combustion analyzers, clamps, digital manifolds, and the accessories that actually last.
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Thanks for keeping the conversation grounded and useful. Stay safe out there, and see you on the board next week.

24V short: clip a 3A resettable on R, then ‘pull wires’; faster, but occasional nuisance trips. Bluetooth probes help?

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I keep a 24V test lamp in-line on R; walk the run and wiggle the low‑voltage bundle — when the lamp flickers or goes full bright you’re on top of the short, usually at the coil pan or a sharp knockout. If it’s intermittent, I switch to a mA clamp on R and bring safeties/calls back one by one, @slee — like a tiny metal detector.

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And i run R through a 1A auto‑reset breaker with a cheap piezo buzzer paralleled across it so I can hear it pulse while I flex low‑voltage runs — found a staple pinch behind a baseboard twice. > clamp on R and bring safeties/calls back one by one, @slee — like a tiny metal Same idea, just audible; pull R off the board first so you’re not chattering relays.

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