Every guide is one specific fault — a code, a warning, a behavior — worked through in the order that actually resolves it: what it means, the checks in sequence, what it costs, and the exact point where it becomes a dealer’s job.
Guides
In-depth, plain-English guides for the codes and failures that send standby owners searching — usually mid-outage.
It cranks 5 times and quits. Fuel first, air second — the full sequence, and the point where it becomes a dealer’s manometer.
Code 1505The cranking alarm that starts at the battery. Why resting voltage lies, and the wire-18 branch that ends at a dealer.
Code 1900The engine runs fine and the house gets nothing. Slip rings, brushes, and the firmware quirk that changes the first step.
BatteryThe 12.1-volt warning, load testing, charger faults, and the 26R / 525 CCA spec that ends the guesswork.
ExerciseA missed weekly run is a failed start you didn’t witness. The five causes, in the order they actually happen.
No-startNo code, just cranking. The fuel-air-battery walk that separates a $0 valve from a dealer visit.
Code 2100Arithmetic or failure? Load sequencing, the breaker-off start method, and when a light-load trip points inside the machine.
The guide got you partway. The diagnostic finishes it: enter your code, answer what the machine is doing, and get an honest read — $0 fix, DIY battery/fuel work, or a dealer job with the typical cost attached. If it needs the full map, the $39 Fault-Code Kit has the complete decoder across controller generations, the battery and fuel deep-dives, and the dealer cost map.