Is It Worth Repairing a Generator?
In This Guide
When a generator fails, the instinct during an outage is to buy a new one and move on. Before you do, it is worth pausing, because the answer to is it worth repairing a generator is more often yes than people expect. The most common faults are inexpensive, and a generator is a simple, long-lived machine. The decision comes down to three things, and once you weigh them the right call is usually clear.
The Core Rule: The 50 Percent Line
The simplest guide, and the one professionals use, is to compare the repair cost against a comparable new generator.
Because most generator repairs are cheap fuel-system fixes, the overwhelming majority fall comfortably below that line. It is the rare, major internal repair on an old machine that pushes you toward replacing.
Factor 1: What's Actually Wrong
The type of fault matters more than anything, because generator faults vary hugely in cost.
| Fault | Repair usually worth it? |
|---|---|
| Blocked carburetor / stale fuel | Yes, almost always. Cheap fix. |
| Dead battery, spark plug, air filter | Yes. Minor parts. |
| Failed AVR | Usually. A replaceable part. |
| Lost residual magnetism | Yes. Often just field flashing. |
| Major engine damage, seized, low compression | Often not, on an older unit. |
Factor 2: The Age of the Generator
Age changes the maths. A two-year-old generator with a failed AVR is clearly worth fixing. A fifteen-year-old unit needing the same repair is a closer call, because more parts are near the end of their life and the next failure may not be far behind.
Our generator lifespan guide covers how long different generators are built to last, which feeds directly into this decision.
Factor 3: The Repair History
One repair on an otherwise sound generator is easy to justify. But if you are on the third repair in two years, the machine is telling you something. Stacking repairs on a unit that keeps failing usually costs more in the end than replacing it, and worse, it fails again when you least want it to.
When Replacing Makes Sense
Lean toward a new generator when several of these are true: the unit is old, the repair is a major internal one, it has needed repeated repairs, parts are hard to find for the model, or your power needs have grown and the old unit was always undersized.
That last one is worth flagging. If you are replacing anyway, it is the moment to size the new generator correctly, which our sizing guide covers.
When Repairing Almost Always Wins
Repair with confidence when the generator is not old, the fault is a common fuel-system or electrical one, and it has an otherwise clean history. That describes most failed generators, which is the whole reason a diagnosis is worth getting before you write the machine off.
Rather Have a Real Technician Handle It?
A Wildwood technician comes to your home, diagnoses the generator on site, and gets it running, usually in about an hour. More than 10,000 repairs completed since 2019, with flat rates quoted before we arrive so there are no surprises. When you need power back, you need it back now.