Generator repair and diagnostics across SE Massachusetts.

The most common causes of a no-start on a Generac air-cooled unit are: a dead or weak battery (especially after a winter where the unit didn’t exercise), a fuel delivery problem (low LP tank, gas valve not opening, carburetor issue), or an overcrank fault logged in the controller that has to be cleared before the unit will attempt to start again. A less common but important one is a failed exercise run that the unit logged as a shutdown fault, which latches and prevents the next start until the fault is acknowledged. When you call, Tyler will ask you for the fault code on the display, whether the unit cranked at all or stayed silent, and whether it’s been exercising on its weekly schedule. That narrows it down before he arrives, and in some cases he can walk you through a safe reset over the phone.

If your unit is within Generac’s factory warranty period (5 years on residential air-cooled Guardian units when registered within 30 days of install; 3 years if not registered) and the failure is a covered component, the parts cost is a Generac warranty claim. As a certified warranty technician, Tyler handles the claim directly: the parts ship to the shop, labor is credited through Generac’s warranty portal, and you pay no parts cost. Labor rates on warranty work follow Generac’s published schedule, which covers a portion of the diagnostic and repair time. To confirm coverage, Tyler needs the unit’s model and serial number plus the install date. If you don’t have those handy, the serial is on the label inside the unit housing.

Most common fault repairs, including battery replacement, carburetor rebuild, sensor replacement, and transfer switch relay replacement, are same-visit repairs. Tyler carries the most common Generac fault parts in his truck, so a battery swap or carburetor kit install typically takes two to three hours on-site including the pre-repair diagnostic and the post-repair load test. Controller board replacements or transfer switch replacements that require parts not in truck stock are usually completed within three to five business days once parts ship. Tyler will give you a realistic timeline on the diagnostic visit and won’t ask you to commit to a repair scope without a fixed-price written quote first.

That’s almost always the automatic transfer switch, not the generator engine. The ATS is the device that senses utility voltage loss, signals the unit to start, waits for stable generator voltage, and then throws the physical transfer to move your home’s load from utility to generator. If the ATS sensing relay has failed, the switch never gets the signal to transfer even if the generator is running perfectly. Other causes include a transfer mechanism that’s bound up mechanically, a controller communication fault between the ATS and the generator panel, or, occasionally, a generator that’s reaching stable voltage but outside the frequency tolerance the ATS is looking for. Tyler can diagnose and test the full transfer sequence on-site. If the ATS needs replacement and the unit is under warranty, that’s a warranty claim he handles directly.

Tyler’s certification and parts stocking are Generac-focused, and Generac is the brand he sees most often in southeastern Massachusetts. He can diagnose and perform basic maintenance on other major brands including Kohler, Briggs and Stratton, and Champion air-cooled units, though warranty work on non-Generac units has to go through that manufacturer’s own service network. If you have a Kohler or another brand and need a diagnostic, reach out through the contact form with the model and the fault you’re seeing, and Tyler will tell you honestly whether it’s a job he can take on or whether you’re better served by that brand’s dealer network.