Amp Nerd https://validator.w3.org/feed/docs/rss2.html Blog Your Panel Breaker Is Not the Disconnect the Condenser Needs A Condensate Pump Safety Switch Is Not an Optional Accessory A Glowing Ignitor Can Still Be Too Cold to Light the Burner A Flame Sensor Does Not Sense Heat—It Measures a Tiny Current A Limit Switch That Trips Is Reporting Airflow, Not Failing A Flashing Furnace Board Light Is a Message, Not a Verdict An ECM Blower Is Not Just a More Efficient Version of a PSC An Inverter Mini-Split Does Not Cycle On and Off Like an Air Conditioner Steam Off a Heat Pump in Winter Is Defrost, Not a Fire Emergency Heat Is Not the Cold-Weather Setting on a Heat Pump Home The C-Wire Does Not Power a Thermostat—It Completes the Circuit A Run Capacitor Can Fail Without Bulging or Leaking A Chattering Contactor Is Usually a Control-Voltage Problem A Hard Start Kit Does Not Repair a Failing Compressor Compressor Inrush Is Brief—It Does Not Set Your Breaker Size Outdoor Lighting Trips a GFCI in the Rain for a Reason A Crowded Gang Box Runs Hotter Than the Sum of Its Devices The Metal Yoke on a Device Is Part of the Ground Path Back-Wired Is Not Backstabbed—The Clamp Makes the Difference Pigtailing Aluminum Wire Needs a Listed Connector, Not a Wire Nut A Wobbling Fixture Usually Means the Box Moved, Not the Screws A Device Set Back Behind Tile Needs an Extender, Not Longer Screws A Buzzing Doorbell Is Usually the Transformer, Not the Button Interconnected Smoke Alarms Share a Signal Wire, Not Power An Exit Sign That Glows Is Not Proof the Battery Works A Closet Light Is About Clearance to Shelves, Not Wattage The Space Directly Above a Tub Has Its Own Fixture Rules An LED Does Not Burn Out—It Quietly Gets Dimmer Two Bulbs with the Same Kelvin Number Can Still Look Different Flicker You Cannot See Can Still Freeze a Spinning Blade Not Every LED Driver Dims the Same Way—Protocols Differ Sizing a Landscape Transformer to the Exact Wattage Is a Mistake Dim Landscape Lights at the End of the Run Are a Voltage Problem The Weak Link in Under-Cabinet Lighting Is the Driver Location A Track Lighting Run Has a Load Limit Set by the Track The Fixture Label Can Demand a Hotter-Rated Supply Wire Fixture Wire Is Rated for Heat, Not for Running Through Walls An LED Retrofit Kit Does Not Erase the Old Can’s Rating A Recessed Light Blinking On and Off Is Often Its Thermal Cutout An IC Rating Is About Insulation Contact, Not Bulb Brightness A Fan-Rated Box Carries a Marked Weight Limit You Can Exceed A Dimmer Is Not a Fan Speed Control—The Load Behaves Differently A Timer Switch Rated in Watts Can Still Fail on Inrush A Dusk-to-Dawn Photocell Reads Light, Not the Clock An Occupancy Sensor and a Vacancy Sensor Are Not the Same Switch Ganging Dimmers Together Costs You Wattage You Already Paid For Too Few LED Bulbs Can Leave a Dimmer Below Its Minimum Load A Dimmer Compatibility List Is Test Data, Not Marketing